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	<title>Seafari Coaching</title>
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	<title>Seafari Coaching</title>
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		<title>Nuclear Waste Becomes Electricity, Cuts Radioactivity 99.7%</title>
		<link>https://www.seafari.se/sv/uncategorized/nuclear-waste-becomes-electricity-cuts-radioactivity-99-7/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Fri, 20 Feb 2026 07:16:31 +0000</pubDate>
				<category><![CDATA[Uncategorized]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3976</guid>

					<description><![CDATA[DOE researchers at Jefferson Lab are developing Accelerator‑Driven Systems that both generate electricity and transmute long‑lived nuclear waste into safer forms. The approach could shrink radioactive storage timelines from 100,000 years to just 300. Key Points: ADS fires high‑energy protons at liquid mercury targets, producing neutrons that transmute waste while generating heat for electricity  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-1"><p>DOE researchers at Jefferson Lab are developing Accelerator‑Driven Systems that both generate electricity and transmute long‑lived nuclear waste into safer forms. The approach could shrink radioactive storage timelines from 100,000 years to just 300.</p>
<div>
<p><strong>Key Points:</strong></p>
<ul>
<li>ADS fires high‑energy protons at liquid mercury targets, producing neutrons that transmute waste while generating heat for electricity</li>
<li>Advanced niobium‑tin cavity coatings and 10‑megawatt magnetron sources enable higher‑temperature operation with standard cooling units</li>
<li>The $8.17M NEWTON program, with partners RadiaBeam, General Atomics, and Stellant Systems, is advancing toward scalable deployment</li>
</ul>
<p><strong>Why It Matters:</strong> This technology reframes nuclear waste as a recyclable energy source, potentially solving one of the most persistent challenges in nuclear power: safe, long‑term storage.</p>
</div>
<p><a href="https://u29682053.ct.sendgrid.net/ls/click?upn=u001.kgb8k8r0aUm-2BeMyB-2FPLFQOmqTmcLHKqT0P-2FTvhf-2B0UzcwX97kkwQCfAHc62joqY-2BumXO2-2FUXp27-2FRZ5scWLMIILDPKJwOKhHkrSRTTySaWOYqJHHd43aSKGhPktEvOIiIxMj_sm3y7f54iD3o2q2-2Bf1py-2FSnjkAqR3HzVDq3Y4yJPzE02ffOHV-2BGIF3Zg-2BSnFKTuX-2FPz5txkIRJ5uo-2FgIIIUKr-2B9Vj79c6tvDfJ9YtZmEYUS0lRyTvn4tWk2sZxHzIjAW3ISMI97V8MRJ2hY-2FeYGy-2BBsJBeZBCZoBa6uD0jl90m2EPNzNQUvMpIUjaSnT0JuoAAAQulA1JFiNr4NJFCmWTJrZRrd95SlRF9WTxobNDrkro2ivVWGhgX81AJtu5jS-2Fv-2B4KWRvC-2BJB-2Bf235GSZS6XK2w5AYBaE-2BT0VmAPqeLdNrv-2FVGwvf3sH8WhucAPSj7ZdrcZ0ktCdU2bFWFGI22y1BovSM4vH04PXXBx6yVeEyQSMzRV2bpvrY3rEJNQtSExgqcZH9R-2FspovH9degJsGg-3D-3D" target="_blank" rel="noopener">interestingengineering.com</a></p>
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		<title>The New Compass: Why AI Without Human Wisdom Is Dangerous</title>
		<link>https://www.seafari.se/sv/ai/the-new-compass-why-ai-without-human-wisdom-is-dangerous/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Wed, 22 Oct 2025 21:24:36 +0000</pubDate>
				<category><![CDATA[AI]]></category>
		<category><![CDATA[Coaching]]></category>
		<category><![CDATA[Innovation]]></category>
		<category><![CDATA[Leadership]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3662</guid>

					<description><![CDATA[Everyone is betting on AI to make better decisions. But what if we're about to automate and scale exactly the wrong things? Three days into my solo Atlantic crossing—somewhere between the Canaries and Cape Verde, 300 nautical miles from the nearest land—my autopilot began to fail. The wind had shifted and increased while I  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-2"><p><i>Everyone is betting on AI to make better decisions. But what if we&#8217;re about to automate and scale exactly the wrong things?</i></p>
<p>Three days into my solo Atlantic crossing—somewhere between the Canaries and Cape Verde, 300 nautical miles from the nearest land—my autopilot began to fail. The wind had shifted and increased while I slept. The autopilot was struggling to compensate, overworking itself, overheating.</p>
<p>Here&#8217;s what&#8217;s remarkable: I was asleep below deck when I sensed something was wrong. Not heard—sensed. The movement of the boat changed. My body registered the shift before my conscious mind processed it. I woke up and immediately knew I needed to adjust the autopilot settings before it burned out completely.</p>
<p>This is human-machine collaboration at its best. The autopilot was doing something I couldn&#8217;t—holding course with precision while I slept. But I was doing something it couldn&#8217;t—sensing the broader context, feeling when the conditions had changed beyond its parameters, knowing when to intervene. We were partners, each contributing what the other lacked.</p>
<p>For those unfamiliar with solo sailing: without an autopilot, you cannot sleep. Someone must be at the helm 24 hours a day. In a crewed boat, you rotate. Solo, if you stop to sleep, you&#8217;re not racing—you&#8217;re drifting. And if you don&#8217;t sleep, within days you&#8217;re hallucinating, your judgment deteriorates, you become a danger to yourself. Sleep deprivation at sea kills. So this partnership isn&#8217;t philosophical—it&#8217;s survival.</p>
<p>When the autopilot eventually did fail completely, I was able to repair it. Not because I&#8217;m a mechanical genius, but because I had prepared. Before leaving, I&#8217;d thought through the scenarios: What could break? What would I need? I&#8217;d brought spare parts specifically for this failure. The preparation didn&#8217;t prevent the problem, but it meant I could solve it when it occurred.</p>
<p>This connects to something I learned across all my expeditions: preparation doesn&#8217;t eliminate fear or prevent problems. But it transforms your relationship with uncertainty. When you&#8217;ve thought through the scenarios and equipped yourself to handle them, fear becomes useful information rather than paralyzing emotion. You gain the space between stimulus and response where wisdom lives.</p>
<p>We&#8217;re at a similar moment with AI in business. And the mistake most leaders are making is thinking AI will fix their decision-making problems. It won&#8217;t. It will amplify them.</p>
<p><b>The Seductive Promise of Artificial Objectivity</b></p>
<p>The sales pitch for AI in business is compelling: finally, decisions based on data rather than emotions. Finally, pattern recognition at scale. Finally, bias-free analysis that&#8217;s not colored by human psychology.</p>
<p><b>It sounds perfect. And it&#8217;s dangerously incomplete.</b></p>
<p>Here&#8217;s what&#8217;s actually happening: AI is pattern-matching at superhuman speeds. But the patterns it finds are only as good as the data it&#8217;s trained on and the questions you ask it. If your training data contains historical biases—and it does—AI will learn and scale those biases. If you&#8217;re asking the wrong questions because you&#8217;re in a fear state—and most leaders are—AI will give you very efficient answers to the wrong questions.</p>
<p>Garbage in, garbage out. But now the garbage is being generated at the speed of light and with the veneer of algorithmic authority.</p>
<p><b>What AI Cannot Do</b></p>
<p>Let me be clear: I&#8217;m not anti-AI. I&#8217;m using AI right now in various aspects of my coaching practice and business operations. It&#8217;s an extraordinary tool. But like any powerful tool, it&#8217;s only as good as the person wielding it. And there are things AI fundamentally cannot do:</p>
<p><b>AI Cannot Sense Context Beyond Data</b></p>
<p>When you&#8217;re in Antarctica and you feel the quality of the ice change—not just see it on instruments, but feel it through the hull—that&#8217;s human sensing. When you walk into a boardroom and immediately know the real conversation isn&#8217;t<b> the one on the </b>agenda, that&#8217;s human sensing. When you read a contract and something feels off before you can articulate why, that&#8217;s human sensing.</p>
<p>AI can process millions of data points. But it cannot sense the things that aren&#8217;t yet data. It cannot pick up on the subtle shifts in energy, tone, and unspoken dynamics that often contain the most important information. The best leaders I know—in sailing and in business—have highly developed sensing capacity. AI can support this, but never replace it.</p>
<p><b>AI Cannot Hold Paradox</b></p>
<p>The most important business decisions exist in paradox: expand or consolidate, hire fast or hire slow, maintain culture or disrupt it, optimize the present or invest in the future. AI can analyze the trade-offs. It can model scenarios. But it cannot hold the creative tension that allows a third option to emerge—the one that honors both sides of the paradox in a new way.</p>
<p>This capacity to hold paradox, to stay present with competing truths until wisdom emerges, is distinctly human. And it requires a nervous system that can tolerate discomfort without collapsing into either/or thinking.</p>
<p><b>AI Cannot Navigate the Unmapped</b></p>
<p>AI is brilliant at optimization—finding the best path within known parameters. But true innovation happens in uncharted territory. It requires intuitive leaps that can&#8217;t be justified by existing data because the data doesn&#8217;t exist yet.</p>
<p>When I decided to do the Atlantic crossing in 2001, no AI would have recommended it. The data said: recession, post-9/11 economy, sponsors pulling out, high risk, uncertain return. But my intuition—informed by deep self-knowledge, pattern recognition from years of sailing, and a clear sense of my values and purpose—said this was exactly what I needed to do. I was right. That journey transformed me in ways that created value for decades.</p>
<p><b>AI Cannot Be Authentic</b></p>
<p>The leadership that builds trust, attracts talent, and creates psychological safety is authentic leadership. People follow humans they trust, who are genuine, who admit uncertainty, who show vulnerability alongside competence. AI can help you craft messages and analyze sentiment. But it cannot be you. And in an increasingly AI-mediated world, authentic human presence becomes more valuable, not less.</p>
<p><b>The Real Risk: Outsourcing Wisdom</b></p>
<p><b>Here&#8217;s my concern: we&#8217;re rushing to outsource decision-making to AI precisely because decision-making from a clear, wise place is so difficult. It requires:</b></p>
<ul>
<li>Doing your inner work to distinguish fear from intuition</li>
<li>Developing the capacity to tolerate uncertainty without premature closure</li>
<li>Building genuine self-knowledge about your patterns, biases, and triggers</li>
<li>Staying present with complexity rather than reducing it to false simplicity</li>
<li>Taking responsibility for outcomes even when the path wasn&#8217;t clear</li>
</ul>
<p>That&#8217;s hard. Really hard. So the temptation is to let AI do it. &#8221;The algorithm says&#8230;&#8221; becomes the new &#8221;I was just following orders.&#8221; It&#8217;s abdication of responsibility disguised as technological sophistication.</p>
<p>But here&#8217;s what happens when you outsource your wisdom: your capacity for wisdom atrophies. Like any human capability, if you don&#8217;t use it, you lose it. A generation of leaders who defer to AI for every significant decision will be a generation that never develops the judgment, intuition, and wisdom that makes great leadership possible.</p>
<p>And we&#8217;ll create organizations that are optimized for everything except what matters most: human flourishing, genuine innovation, and creating value that serves rather than extracts.</p>
<p><b>The Path of Integration: AI as Collaborative Tool</b></p>
<p>So what&#8217;s the alternative? Not rejecting AI—that&#8217;s foolish and impossible. But approaching it as a collaborative tool that amplifies human wisdom rather than replaces it.</p>
<p>This requires a very specific type of leadership development. You need to become the kind of leader who can:</p>
<p><b>Use AI for Pattern Recognition, Not Decision-Making</b></p>
<p>Let AI show you patterns in your data, your market, your organization. But make decisions from a place of integrated wisdom—cognitive understanding PLUS somatic awareness PLUS intuitive knowing PLUS values alignment. AI informs the decision; it doesn&#8217;t make it.</p>
<p><b>Question AI&#8217;s Assumptions</b></p>
<p>Every AI model has assumptions baked into its training data and algorithms. Leaders need the clarity to ask: What is this optimizing for? Whose perspective is centered? What&#8217;s being excluded? What would shift if we changed the question? This requires you to be so clear about your own values and biases that you can spot them in the AI&#8217;s outputs.</p>
<p><b>Create Psychological Safety Alongside Technological Advancement</b></p>
<p>As AI handles more tactical decisions, the strategic and human elements become more crucial. But these only flourish in psychologically safe environments where people can think independently, challenge assumptions, share half-formed ideas, and take intelligent risks.</p>
<p>Fear-based cultures cannot create this safety. Leaders who are themselves driven by unexamined fears cannot model the courage required. This is why the inner work isn&#8217;t separate from the AI strategy—it&#8217;s the foundation that makes AI useful rather than dangerous.</p>
<p><b>Stay Connected to Your Somatic Wisdom</b></p>
<p>When you&#8217;re looking at AI-generated insights, can you feel the resonance or dissonance in your body? That subtle sense of &#8221;yes, this aligns&#8221; or &#8221;something&#8217;s off here&#8221;? Most leaders have learned to ignore these signals in favor of purely rational analysis. But in an AI-augmented world, this somatic wisdom becomes your most valuable differentiator.</p>
<p>Developing this capacity requires practice: learning to read your body&#8217;s signals, to distinguish fear from intuition, to stay present with uncertainty long enough for wisdom to emerge. This is learnable—but it requires commitment and usually guidance.</p>
<p><b>The Leadership Imperative</b></p>
<p>We&#8217;re at a fork in the road. One path leads to AI-optimized organizations that are efficient, data-driven, and fundamentally soulless—places where humans are increasingly peripheral to decisions that affect their lives. Where innovation is incremental because AI can only work with what already exists. Where psychological safety is impossible because fear is encoded into the algorithms.</p>
<p>The other path leads to organizations where AI amplifies human wisdom—where technology handles the routine and humans focus on the creative, the strategic, the compassionate, the innovative. Where leaders have done enough inner work to distinguish fear from intuition, to stay present in uncertainty, to make decisions from wholeness rather than wounds. Where psychological safety allows both humans and AI to contribute their unique strengths.</p>
<p>Which path we take is not determined by the technology. It&#8217;s determined by the consciousness of the leaders deploying it.</p>
<p>This is why I believe the most important work for leaders right now isn&#8217;t learning to use AI better—though that matters. It&#8217;s becoming the kind of human who can use AI wisely. Who can distinguish between optimization and wisdom. Who can hold space for the unmeasurable and unquantifiable aspects of value creation. Who can stay connected to authentic intuition even when algorithms are whispering different suggestions.</p>
<p>This isn&#8217;t soft skill development. This is the hardest work there is—confronting your fears, examining your biases, developing your capacity to stay present in uncertainty, learning to distinguish the different voices in your system. But it&#8217;s also the highest-leverage work you can do. Because as you become clearer, everything else becomes clearer. Your strategic thinking sharpens. Your people decisions improve. Your innovation accelerates. Your use of AI becomes wise rather than just efficient.</p>
<p><b>The Questions That Matter</b></p>
<p><b>As you think about integrating AI into your organization, ask yourself these questions:</b></p>
<ul>
<li>Am I clear enough about my own fears and biases to recognize when they&#8217;re influencing how I use AI?</li>
<li>Can I distinguish between what feels efficient and what feels wise?</li>
<li>Do I have the somatic literacy to sense when something&#8217;s off in AI&#8217;s recommendations?</li>
<li>Am I creating the psychological safety that allows humans to challenge AI and think independently?</li>
<li>What values am I optimizing for, and are they reflected in how I&#8217;m deploying AI?</li>
<li>Am I using AI to avoid difficult decisions or uncomfortable self-examination?</li>
</ul>
<p>If you can&#8217;t answer these questions clearly, that&#8217;s not a failure—it&#8217;s information. It&#8217;s showing you where the work needs to happen.</p>
<p><b>The Journey Ahead</b></p>
<p>In my years of sailing, I learned that the most dangerous sailor isn&#8217;t the one who lacks technology—it&#8217;s the one who has technology but lacks the wisdom to use it well. Who trusts the GPS without questioning whether the chart data is current. Who follows the routing algorithm into dangerous waters because they&#8217;ve stopped using their own judgment.</p>
<p>The same is true in business. The most dangerous leader in the AI era won&#8217;t be the technophobe—it will be the one who deploys AI without doing the inner work to use it wisely. Who optimizes for efficiency without questioning what&#8217;s being optimized. Who scales their biases at algorithmic speed because they never examined them in the first place.</p>
<p>The opportunity—and it&#8217;s a massive one—is to become the kind of leader who can harness AI&#8217;s power while remaining grounded in human wisdom. Who can let algorithms handle the routine while you focus on the genuinely strategic. Who can use data and pattern recognition to inform decisions that remain fundamentally wise, values-aligned, and courageously human.</p>
<p>This is the leadership work of our time: developing the inner clarity, somatic awareness, and authentic courage that allows you to use powerful tools without being used by them. To create organizations where technology and humanity both flourish. Where innovation happens not despite fear but because leaders have learned to work with it constructively.</p>
<p>You cannot do this work alone. The patterns you most need to see are precisely the ones you&#8217;re living inside of. The fears you need to distinguish from intuition are the ones that feel most like truth. The authentic self you need to access has been covered by decades of protection and adaptation.</p>
<p>This is the work I do with leaders: helping you develop the internal clarity and capacity that makes everything else possible. Not telling you what decisions to make, but helping you become the kind of leader who makes wise decisions naturally—with or without AI. The kind of leader who creates organizations where courage, authenticity, and genuine innovation thrive. Where AI is a powerful ally in service of human wisdom, not a replacement for it.</p>
<p><b>&#8212;</b></p>
<p><b><i>If these ideas resonate with you, if you&#8217;re recognizing yourself or your organization in these patterns, let&#8217;s talk. The journey from fear-based to wisdom-based leadership is one of the most important you&#8217;ll take—for yourself, for your organization, and for everyone your decisions touch.</i></b></p>
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		<title>The Old Map: Why Your Decision-Making Was Already Broken (Before AI)</title>
		<link>https://www.seafari.se/sv/ai/the-old-map-why-your-decision-making-was-already-broken-before-ai/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Wed, 22 Oct 2025 21:20:57 +0000</pubDate>
				<category><![CDATA[AI]]></category>
		<category><![CDATA[Coaching]]></category>
		<category><![CDATA[Innovation]]></category>
		<category><![CDATA[Leadership]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3659</guid>

					<description><![CDATA[Most leaders think AI will eliminate bias from their decisions. But what if the real problem isn't the tool—it's the person holding it? I've sailed solo across the Atlantic. I've navigated pack ice in Greenland and weathered storms off Antarctica in a 50-foot sailboat with a skeleton crew. I've built and run companies since  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-3 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-3"><p><i>Most leaders think AI will eliminate bias from their decisions. But what if the real problem isn&#8217;t the tool—it&#8217;s the person holding it?</i></p>
<p><i>I&#8217;ve sailed solo across the Atlantic. I&#8217;ve navigated pack ice in Greenland and weathered storms off Antarctica in a 50-foot sailboat with a skeleton crew. I&#8217;ve built and run companies since 1992, through boom times and crashes, through partnerships formed and dissolved, through pivots that worked and ones that nearly sank everything.</i></p>
<p><i>And I can tell you this: the most dangerous moments weren&#8217;t when the wind hit 50 knots or when the market crashed. They were when I made decisions based on fear I didn&#8217;t recognize as fear.</i></p>
<p><i>Because fear is a master of disguise. It dresses up as prudence, strategic thinking, risk management. It speaks in the language of logic while pulling strings from your nervous system. And in business, this costs you everything—innovation, relationships, market position, and the opportunity to build something that actually matters.</i></p>
<p><b>The Illusion of Rational Decision-Making</b></p>
<p>Here&#8217;s what most CEOs and senior leaders won&#8217;t admit in the boardroom: a shocking number of their &#8217;strategic decisions&#8217; are actually trauma responses wearing a business suit.</p>
<p>That aggressive acquisition strategy? Might be fear of irrelevance. The reluctance to delegate? Fear of losing control or being exposed as unnecessary. The pivot away from innovation toward &#8217;proven business models&#8217;? Fear of failure dressed up as fiscal responsibility. The difficulty firing that toxic but productive executive? Fear of conflict hardwired from childhood dynamics you&#8217;ve never examined.</p>
<p>I know this intimately because I&#8217;ve lived it. In 2001, as I prepared for the Mini Transat race—4,500 nautical miles solo across the Atlantic in a 6.5-meter boat—the financial climate was disastrous. September 11th had just happened. Sponsors were pulling out of everything that wasn&#8217;t essential. My inner voice screamed daily: &#8221;This is never going to work. You&#8217;re not good enough. This is reckless.&#8221;</p>
<p>What I didn&#8217;t realize then—but understand now after decades of both sailing and coaching—was that I was hearing multiple voices speaking simultaneously:</p>
<ul>
<li>The voice of real risk assessment (this IS objectively challenging)</li>
<li>The voice of old wounds (&#8221;you&#8217;re not good enough&#8221; was my father&#8217;s refrain)</li>
<li>The voice of pattern recognition and intuition (some concerns were valid)</li>
</ul>
<p>I couldn&#8217;t distinguish between them. So sometimes I ignored all the voices and pushed through recklessly. Other times I let fear paralyze me when bold action was exactly what was needed. I was making decisions, certainly. But I wasn&#8217;t making conscious, clear-channeled decisions.</p>
<p><b>The Body Knows Before the Mind Does</b></p>
<p>Here&#8217;s something neuroscience has confirmed but sailors have known forever: your body processes threat faster than your conscious mind. When I&#8217;m alone at night crossing shipping lanes in the pitch black, my nervous system detects danger—the low frequency vibration of a cargo ship&#8217;s engine—before I consciously register what&#8217;s happening.</p>
<p>That&#8217;s a feature, not a bug. It kept our ancestors alive. But in business, this same mechanism misfires constantly.</p>
<p>Your body stores memories of every time you&#8217;ve been hurt, rejected, humiliated, or failed. These aren&#8217;t just cognitive memories—they&#8217;re encoded in your nervous system, in your muscle tension, in your breathing patterns. When a current situation bears even a passing resemblance to a past wound, your body sounds the alarm. Fight, flight, or freeze kicks in. And then your rational mind, brilliant as it is, constructs a logical-sounding explanation for why this feeling is actually strategic thinking.</p>
<p><b>I see this constantly in the leaders I coach:</b></p>
<ul>
<li>The CEO whose shoulders rise and jaw clenches when discussing delegation—their body remembering being undermined by a co-founder years ago</li>
<li>The founder who gets mysteriously exhausted when their company starts to succeed—their nervous system associating visibility with danger</li>
<li>The executive who makes brilliant strategic decisions but terrible people decisions—because intimacy and trust trigger attachment wounds they&#8217;ve never addressed</li>
</ul>
<p>These aren&#8217;t character flaws. They&#8217;re unprocessed experiences speaking through the body. But until you learn to recognize them, they run your business from the shadows.</p>
<p><b>The Cost of Fear-Based Leadership</b></p>
<p><del><b>Let me be direct about what fear-based decision-making costs organizations:</b></del></p>
<p><b>Innovation Dies First</b></p>
<p>Radical innovation requires psychological safety. It requires the capacity to tolerate uncertainty, to sit with not-knowing, to experiment without guaranteed outcomes. Fear-driven leaders say they value innovation, but their nervous systems are screaming &#8221;make it predictable, make it safe, make it proven.&#8221;</p>
<p>So they fund the incremental improvement, the me-too product, the safe pivot. They hire the candidate with the perfect resume instead of the one with the spark. They kill the promising but risky project in favor of optimizing the declining revenue stream. And then they wonder why more nimble competitors are eating their lunch.</p>
<p><b>Talent Leaves</b></p>
<p>The best people—the ones with options, the creative thinkers, the courageous leaders—they can smell fear-based cultures from a mile away. They feel it in the meetings where people are performing rather than problem-solving. They sense it in the political maneuvering, the blame-shifting, the CYA emails.</p>
<p>What keeps them is authenticity, psychological safety, and leadership that models courage. Not recklessness—courage. The willingness to name what&#8217;s true, to own mistakes, to make tough calls from a place of clarity rather than panic.</p>
<p><b>Strategic Opportunities Are Missed</b></p>
<p>Fear narrows perception. When your nervous system is activated, you literally cannot see opportunities—your brain is focused on scanning for threats. I&#8217;ve watched leaders pass on partnerships that would have transformed their companies, turn down acquisition offers they&#8217;d later regret, or hesitate just long enough to miss a market window. Not because the data wasn&#8217;t there. Because their fear was louder than their wisdom.</p>
<p><b>The Preparation Paradox</b></p>
<p>Here&#8217;s something that surprised me in my sailing expeditions: the more prepared I became, the less afraid I was. Not because the ocean became less dangerous—it didn&#8217;t. But because preparation changed my relationship with uncertainty.</p>
<p>Before Antarctica, we spent months planning for scenarios: what if the engine fails in pack ice? What if someone falls overboard in 4°C water? What if the satellite communication goes down? We practiced the scenarios, built redundancy, trained our responses.</p>
<p>This didn&#8217;t eliminate fear—fear is a natural and sometimes useful response to real danger. But it eliminated panic. It created space between stimulus and response. And in that space, wisdom could emerge.</p>
<p>The same principle applies to business leadership. When you&#8217;ve done the inner work—when you&#8217;ve mapped your triggers, understood your patterns, developed your capacity to regulate your nervous system—you gain the most valuable leadership skill: the ability to stay present and clear in uncertainty.</p>
<p>This isn&#8217;t about eliminating emotions or becoming some sort of robot. It&#8217;s about developing the sophistication to distinguish between different signals in your system. To know when that gut feeling is wisdom and when it&#8217;s old wounds. To act from courage rather than react from fear.</p>
<p><b>Why This Matters More Now</b></p>
<p>We&#8217;re at an inflection point. AI is entering every aspect of business decision-making. And here&#8217;s the thing most people are missing: AI doesn&#8217;t eliminate the need for clear human judgment. It amplifies the quality of the human wielding it.</p>
<p>If you&#8217;re making fear-based decisions now, AI will help you make them faster and more efficiently. If you&#8217;re operating from unexamined biases and trauma responses, AI will scale those too. The tool is neutral. The human using it is not.</p>
<p>This is why the work of becoming a clear-channeled leader—someone who can distinguish fear from intuition, who can stay present in uncertainty, who can make decisions from wisdom rather than wounds—isn&#8217;t a nice-to-have. It&#8217;s the essential leadership competency for the next decade.</p>
<p><b>The Path Forward</b></p>
<p>If you&#8217;re recognizing yourself in these patterns, that recognition itself is valuable. You can&#8217;t change what you can&#8217;t see.</p>
<p>The journey from fear-based to wisdom-based leadership isn&#8217;t quick or easy. It requires:</p>
<ul>
<li>Learning to read your own nervous system—understanding where and how fear shows up in your body</li>
<li>Identifying your triggers and patterns—the situations that reliably activate old wounds</li>
<li>Developing regulation capacity—the ability to calm your nervous system and return to clarity</li>
<li>Building discernment—learning to distinguish between fear responses and genuine intuition</li>
<li>Practicing courage—making values-aligned decisions even when fear is present</li>
</ul>
<p>This is inner work that shows up as outer results. As you become clearer, your decisions become better. Your leadership becomes more authentic. Your organization becomes more innovative and resilient. The talent you need starts showing up. The opportunities you couldn&#8217;t see before become obvious.</p>
<p>But here&#8217;s the truth: you can&#8217;t do this work alone. Just as I couldn&#8217;t sail solo across the Atlantic without mentors who&#8217;d made the passage before, without a support team, without people who could see my blind spots—you need guidance for this journey too.</p>
<p>Because the very patterns you&#8217;re trying to see are the ones you&#8217;ve been living inside of. The fears you&#8217;re trying to distinguish from intuition are the ones that feel most like truth. The authentic self you&#8217;re trying to access has been covered over by layers of protection and adaptation.</p>
<p>This is the work I do with leaders. Not giving advice or strategies—though those emerge naturally. But helping you develop the internal clarity and courage that makes everything else possible. Helping you become the kind of leader who can use AI and every other tool from a place of wisdom rather than fear. The kind of leader who creates organizations where innovation flourishes, talent thrives, and genuine value gets created.</p>
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		<title>Navigating the High Seas of Leadership: 12 Challenges CEOs Face in 2026</title>
		<link>https://www.seafari.se/sv/ai/navigating-the-high-seas-of-leadership-13-challenges-ceos-face-in-2026/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Tue, 21 Oct 2025 07:43:21 +0000</pubDate>
				<category><![CDATA[AI]]></category>
		<category><![CDATA[Coaching]]></category>
		<category><![CDATA[Innovation]]></category>
		<category><![CDATA[Leadership]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3654</guid>

					<description><![CDATA[Navigating the High Seas of Leadership: 12 Challenges CEOs Face in 2026 As a CEO, you’re the captain of a ship navigating turbulent waters. The challenges of 2026 demand sharp instincts, a steady hand, and a clear chart to steer your organization toward success. At Seafari, we specialize in coaching CEOs and executive leaders  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-4 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-4"><h1>Navigating the High Seas of Leadership: 12 Challenges CEOs Face in 2026</h1>
<p>As a CEO, you’re the captain of a ship navigating turbulent waters. The challenges of 2026 demand sharp instincts, a steady hand, and a clear chart to steer your organization toward success. At Seafari, we specialize in coaching CEOs and executive leaders to master these storms, blending strategic insight with personal resilience. Drawing from the latest industry insights, here are the 12 biggest challenges facing CEOs today—each paired with a sailing metaphor—and how our coaching can help you sail through them, including the critical balance between work and personal life that often threatens homelife.</p>
<h2>1. Scanning the Horizon for Technological Disruption</h2>
<p>The winds of AI and emerging technologies are reshaping industries like unpredictable squalls on the open sea. Just as a captain must scan the horizon for approaching ships, shifting weather, or hidden rocks, CEOs must anticipate technological trends, prepare strategic plans, and remain flexible as these &#8221;moving targets&#8221; evolve. Jumping on every new tech wave risks capsizing, but ignoring them leaves you adrift. Our coaching at Seafari helps you develop a forward-looking tech strategy, balancing proactive investment with adaptability to harness innovation without being overwhelmed by its pace.</p>
<h2>2. Navigating Economic Fog with Precision Instruments</h2>
<p>Economic volatility—high interest rates, inflation, and geopolitical tensions—shrouds the horizon like dense fog, obscuring the path ahead. Just as a captain relies on modern plotters, sensors, echo sounders, and radar to detect unseen currents, shoals, or approaching storms, CEOs must use data-driven tools like market analytics and financial forecasting to anticipate and adapt to shifting economic conditions. Preparing for these &#8221;moving targets&#8221; requires a flexible plan to avoid running aground, balancing caution with decisive action. At Seafari, we coach you to leverage these instruments for agile scenario planning, ensuring your organization sails steadily through turbulent markets.</p>
<h2>3. Building a Small, Skilled Crew for a Streamlined Voyage</h2>
<p>In sailing, large crews once manned massive ships, each member with a specialized role. Today, advances allow the same vessels to be sailed by just one or two highly skilled sailors, making every crew member’s contribution critical. Similarly, CEOs face a competitive talent market where attracting and retaining top performers is paramount. To draw exceptional talent, you must create meaningful, rewarding roles that inspire engagement, much like designing a sleek, efficient ship. Fostering a positive onboard culture—a good vibe—ensures your crew stays for the journey. At Seafari, we coach you to streamline operations, craft compelling job roles, and build a vibrant workplace culture that attracts and retains the best, ensuring your organization sails efficiently with a dedicated team.</p>
<h2>4. Spotting Hidden Gaps to Thwart Cyber Pirates</h2>
<p>Cyber threats and data privacy regulations are like marauding pirates lurking in the fog, seeking any vulnerability to plunder your ship’s valuable cargo. As sophisticated attacks target your data and systems, CEOs must prioritize cybersecurity investments to fortify defenses. But the challenge goes beyond setting priorities—it’s about spotting hidden gaps where pirates might slip through, from outdated systems to untrained crew. Like a captain scanning for weak points in the hull or rigging, you need a broader view of risks. At Seafari, we coach you to step back and assess the bigger picture, identifying overlooked vulnerabilities and fostering a culture of vigilance to safeguard your organization’s assets.</p>
<h2>5. Steering Beyond Greenwashing to Protect Ocean Ecosystems</h2>
<p>Sustainability is like navigating toward pristine waters, where stakeholders demand genuine environmental, social, and governance (ESG) strategies. Greenwashing and bluewashing—superficial claims of environmental care—can seem harmless, like pouring pool chemicals into a lagoon, but their ripples disrupt the broader ecosystem. Chlorine from resort infinity pools can harm corals, small fish, and local fishing communities, just as low-frequency noise from ocean drilling or wind turbines might disrupt marine life that relies on those frequencies, threatening the very oceans we sail. Earth’s ecosystems are resilient, but only up to a tipping point, much like wolves in Yellowstone or white lions in South Africa, whose absence disrupts entire food chains. True sustainability requires looking beyond immediate actions to their cascading impacts. At Seafari, we coach CEOs to chart holistic ESG strategies, avoiding short-sighted practices and fostering leadership that protects our planet’s vital ecosystems while aligning with business goals, ensuring you sail responsibly toward a thriving future.</p>
<h2>6. Preparing for Storms to Keep the Supply Chain Afloat</h2>
<p>At sea, a broken bow or dwindling supplies in the middle of the Atlantic can’t be fixed by a quick stop at a store, just as supply chain disruptions—geopolitical conflicts, climate events, or trade restrictions—can’t rely on immediate fixes. Like a captain planning for “what if” scenarios, from equipment failures to food shortages, CEOs must assess risks and their probabilities, preparing contingencies without overloading the ship, which could slow the race to success. A well-thought-out plan, like having materials and knowledge to repair a broken bow mid-ocean, enables swift, effective action when disruptions strike. At Seafari, we coach you to anticipate supply chain vulnerabilities, balance preparation with efficiency, and act decisively when challenges arise, ensuring your operations remain buoyant and competitive.</p>
<h2>7. Choosing Safe Harbors in Geopolitical Waters</h2>
<p>Geopolitical instability—trade wars, sanctions, or regional conflicts—is like navigating a sea dotted with treacherous shoals and hostile ports. A captain must decide which countries to stop in and which to sail past, weighing bureaucratic complexities like customs regulations against the safety of mooring in unstable regions. Similarly, CEOs must assess the risks of entering or exiting markets, considering the likelihood of regulatory hurdles or political unrest. Strategic planning, like charting a route with contingency ports, allows you to act swiftly and correctly when conditions shift. At Seafari, we coach you to evaluate geopolitical risks, anticipate bureaucratic and safety challenges, and craft flexible strategies to reposition your business for stability and growth, ensuring you moor in safe harbors.</p>
<h2>8. Charting a Balanced Course Through Digital Transformation</h2>
<p>Digital transformation can feel like outfitting a small sailboat with a supertanker’s electronics—overwhelming and costly without a clear strategy. Modern boats can sail autonomously with connected sensors, hydraulic winches, and AI-driven helms, yet skilled captains and crews remain essential for their intuition and adaptability. CEOs face similar choices: chasing every digital trend out of FOMO, without assessing wins and risks, can overburden your organization, draining time, budgets, and morale. Over-digitalization, like relying solely on GPS and losing the ability to use a sextant, risks vulnerability to cyber pirates or system failures. Data from sensors might suggest heeling the boat more on the last leg, but conditions change, and human judgment often outperforms rigid analytics. At Seafari, we coach you to question the status quo of “digitalize everything,” strategically selecting essential technologies, respecting your crew’s expertise, and fostering engagement by prioritizing relevant data over excessive automation. This balanced approach keeps your unique vessel agile, secure, and crew-driven, ready to sail against the current of overhyped trends.</p>
<h2>9. Uniting a Diverse Crew for a Shared Voyage</h2>
<p>Managing diverse stakeholders—shareholders, employees, customers, regulators, and even Mother Earth—is like leading a crew from different countries, each shaped by unique cultures, upbringings, and beliefs. At sea, I’ve sailed with international teams through extreme conditions, just as I’ve worked across Canada, France, and Spain, and sourced goods from China to Germany. These experiences, informed by NLP and neuroscience, reveal how habits and perspectives form, driving varied behaviors. As a captain, you must foster curiosity and openness, uniting the crew around shared values and a clear purpose—reaching the destination together—while setting boundaries to ensure alignment. Mistakes, like a misjudged tack, are growth opportunities, not sources of shame or blame, and addressing them early prevents bigger storms. This inclusive culture respects individual contributions while honoring the broader ecosystem, including our oceans. At Seafari, we coach CEOs to build a cohesive organizational culture that aligns stakeholders’ diverse priorities with a common goal, fostering trust, collaboration, and respect for all, ensuring your ship sails harmoniously toward success.</p>
<h2>10. Daring to Sail a Bold Course for Innovation</h2>
<p>Innovation is the gust that propels your ship ahead of rivals, but it requires a bold strategy and a crew willing to take unconventional routes. In sailing, a captain might choose a radically different course in a race or across a season, testing tactics and adjusting based on results, rather than relying solely on incremental tweaks. This demands psychological safety, where mistakes are seen as learning opportunities, not failures, and an authentic, brave leader to inspire the crew to think outside the box. Like navigating uncharted waters, true innovation—whether in products, services, or business models—requires aligning on a clear strategy while experimenting with daring tactics. At Seafari, we coach CEOs to foster a culture of courage and experimentation, empowering your team to take bold risks while staying anchored to shared goals. Our passion is helping you unlock your authentic leadership, ensuring your organization sails ahead with innovative, game-changing strategies.</p>
<h2>11. Sharing the Helm to Steer Through Leadership Storms</h2>
<p>The relentless pressure of leadership is like captaining through a gale, where taking on every decision alone leads to burnout and reactive choices. At sea, a skipper who shoulders all responsibilities risks exhausting themselves within days, disengaging the crew by sidelining their knowledge, skills, and sensory inputs. Similarly, CEOs are expected to lead their company, respond to boards and customers, and manage themselves, often feeling isolated at the top. Just as a trusted navigator or co-skipper supports the captain by asking tough questions and offering perspective, a coach provides a sounding board to clarify decisions. Speaking ideas aloud often reveals answers, preventing poor choices born of loneliness. At Seafari, we act as your navigator, offering a safe space to explore challenges, leverage your crew’s expertise, and build resilience, ensuring you steer with clarity and confidence while avoiding the storms of burnout.</p>
<h2>12. Anchoring Homelife Amid Relentless Tides</h2>
<p>The relentless demands of CEO life often strain homelife, like a ship battered by unyielding tides pulling it from its anchor. The intense time commitments, emotional toll of high-stakes decisions, and societal expectations to prioritize work over personal relationships erode connections with family, friends, and self, with studies like one from Harvard Business Review (2024) noting that 60% of executives report personal strain due to leadership pressures. The constant need to be &#8221;on&#8221; leaves little room for nurturing homelife, leading to isolation and imbalance. At Seafari, we coach CEOs to set boundaries, delegate strategically, and prioritize personal well-being, helping you secure your home port—your sanctuary of family and relationships—while steering your professional ship.</p>
<h2>Sail Confidently with Seafari Coaching</h2>
<p>The challenges of 2026 are daunting, but you don’t have to navigate them alone. At Seafari, we empower CEOs and executive leaders to master these turbulent seas. Our tailored coaching combines practical strategies with personal growth, helping you balance professional demands with personal fulfillment. Whether you’re steering through technological storms, economic fog, or the personal strain of leadership, we’re here to guide you to calmer waters.</p>
<p>Ready to chart your course? Contact us at seafari.se to start your coaching journey today.</p>
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		<title>Beneath the Waves: The Hidden Impact of Low-Frequency Sounds on Marine Life</title>
		<link>https://www.seafari.se/sv/ocean/beneath-the-waves-the-hidden-impact-of-low-frequency-sounds-on-marine-life/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Wed, 15 Oct 2025 22:58:51 +0000</pubDate>
				<category><![CDATA[Nature]]></category>
		<category><![CDATA[Ocean]]></category>
		<category><![CDATA[ocean]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3583</guid>

					<description><![CDATA[Have you ever wondered how the subtle hums and rumbles beneath the ocean's surface—sounds we humans might find calming or stressful—affect the creatures that call it home? From the rhythmic crash of waves to the mechanical drone of ships and wind turbines, low-frequency sounds (0.05–50 Hz) and infrasound play a crucial role in marine  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-5 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-5"><div>
<p dir="auto">Have you ever wondered how the subtle hums and rumbles beneath the ocean&#8217;s surface—sounds we humans might find calming or stressful—affect the creatures that call it home? From the rhythmic crash of waves to the mechanical drone of ships and wind turbines, low-frequency sounds (0.05–50 Hz) and infrasound play a crucial role in marine ecosystems. Building on our discussions about human perceptions, let&#8217;s dive into the scientific studies exploring these effects on tuna, marine mammals, and other species. Drawing from lab experiments, field observations, and reviews, we&#8217;ll uncover behavioral disruptions, physiological stress, and potential long-term consequences. This isn&#8217;t just academic—it&#8217;s vital for conservation in an increasingly noisy ocean.</p>
<div aria-label="Atlantic Bluefin Tuna | Oceana" data-testid="image-viewer">
<div>
<div>
<p><img decoding="async" src="https://oceana.org/wp-content/uploads/sites/18/4_0.jpg" alt="Atlantic Bluefin Tuna | Oceana" /></p>
<div><a href="https://oceana.org/marine-life/atlantic-bluefin-tuna/" target="_blank" rel="noopener noreferrer">oceana.org</a></div>
</div>
</div>
<div>
<div title="A majestic bluefin tuna gliding through the ocean depths.">A majestic bluefin tuna gliding through the ocean depths.</div>
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<h2 dir="auto">Studies on Tuna: Disrupted Schooling and Migration</h2>
<p dir="auto">Tuna, like bluefin (<em>Thunnus thynnus</em>) and yellowfin (<em>Thunnus albacares</em>), are highly migratory predators sensitive to low-frequency cues for navigation and communication. Research shows they produce and detect sounds in the 20–130 Hz range, often linked to swim bladder contractions or &#8221;coughing&#8221; behaviors. But anthropogenic noise from boats, offshore wind farms, and seismic surveys can interfere.</p>
<p dir="auto">A 2021 study monitored caged bluefin tuna exposed to ship and wind turbine noises (30 Hz–10 kHz, peaks at 50 Hz, levels 120–182 dB re 1 μPa). Over 10–15 minute exposures, tuna exhibited abrupt dives, school contractions (vertical span reduced by ~30%), faster swimming, and disorientation at higher intensities (&gt;150 dB). Longer sessions delayed reactions but caused persistent shallower positioning, with habituation noted after repeats—suggesting adaptation in captivity but potential migration risks in the wild.</p>
<p dir="auto">Earlier field work in 2007 observed bluefin tuna in Mediterranean traps reacting to boat noise (70–6000 Hz, up to 135 dB at 200–400 m). Schools showed increased vertical movements, direction changes, and dispersion, disrupting homing and foraging. No long-term physiological damage was found, but chronic exposure could elevate stress, mirroring broader fish responses like behavioral changes and hearing loss.</p>
<p dir="auto">These findings highlight tuna&#8217;s vulnerability, with implications for fisheries: noise could reduce catch rates by 50–90% in affected areas.</p>
<div aria-label="Effects of underwater noise on cetaceans | Marine Connection" data-testid="image-viewer">
<div>
<div>
<p><img decoding="async" src="https://marineconnection.org/wp-content/uploads/2020/08/Underwater-noise-pollution.jpg" alt="Effects of underwater noise on cetaceans | Marine Connection" /></p>
<div><a href="https://marineconnection.org/effects-of-underwater-noise-on-dolphins-and-whales/" target="_blank" rel="noopener noreferrer">marineconnection.org</a></div>
</div>
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<div>
<div title="Infographic illustrating underwater noise pollution and its sources affecting marine mammals.">Infographic illustrating underwater noise pollution and its sources affecting marine mammals.</div>
</div>
</div>
<h2 dir="auto">Studies on Marine Mammals: From Stress to Strandings</h2>
<p dir="auto">Marine mammals, including whales, dolphins, and seals, rely on low-frequency sounds for communication, echolocation, and sensing their environment. Baleen whales are particularly attuned to infrasound (down to 7–30 Hz), making them susceptible to shipping, sonar, and seismic noise.</p>
<p dir="auto">A 1994 NRC review synthesized effects from low-frequency sources (12–300 Hz, 115–170 dB), noting avoidance in 50% of baleen whales at &gt;120 dB—gray whales altered paths, bowheads displaced 10–30 km from drillships, and vocalizations decreased. Potential masking of calls and temporary hearing shifts (TTS) were inferred, with chronic stress linked to elevated glucocorticoids.</p>
<p dir="auto">Updated 2019 guidelines set TTS thresholds at 168–183 dB SEL for low-frequency cetaceans, with behavioral changes like strandings from sonar exposures (minutes-long, mid/low-freq). Ship noise causes vocal modifications, respiration changes, and habitat abandonment, with knowledge gaps in long-term population impacts. High-level tones (&gt;1 hour) can damage sensory cells, leading to hearing loss.</p>
<p dir="auto">Overall, effects include anxiety, panic, and ecosystem disruptions, with calls for better mitigation like quieter vessels.</p>
<div aria-label="Marine Invertebrates - Safari Ltd® | Browse the SafariPedia" data-testid="image-viewer">
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<div>
<p><img decoding="async" src="https://cdn.prod.website-files.com/621f789c295b777169edc867/6261ab33fbcbcba7edd47060_Sea-Life---Marine-Invertebrates-Collection-Header%20(1).jpg" alt="Marine Invertebrates - Safari Ltd® | Browse the SafariPedia" /></p>
<div><a href="https://safaripedia.safariltd.com/categories/marine-invertebrates" target="_blank" rel="noopener noreferrer">safaripedia.safariltd.com</a></div>
</div>
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<div title="Vibrant underwater scene featuring marine invertebrates like octopus, lobster, and squid.">Vibrant underwater scene featuring marine invertebrates like octopus, lobster, and squid.</div>
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<h2 dir="auto">Effects on Other Marine Species: From Fish to Plankton</h2>
<p dir="auto">Beyond tuna and mammals, low-frequency noise impacts diverse species, often through vibrations detected by lateral lines, statocysts, or shells.</p>
<p dir="auto">For other fish like cod and herring, seismic air guns (&lt;100 Hz, 160–255 dB) cause fleeing, hemorrhaging, and 50–90% catch drops, with cortisol spikes and barotrauma. Sharks avoid boat noise (10–500 Hz), showing reduced prey capture.</p>
<p dir="auto">Crustaceans (crabs, lobsters) exhibit tail-flips and elevated heart rates from impulses (&lt;100 Hz, 180–210 dB), with chronic shipping noise (hours-days) increasing oxygen use and mortality risk. Mollusks like squid suffer statocyst damage from seismic sounds, leading to erratic behavior and metabolic shifts. Bivalves close valves and reduce filtration under pile-driving (1–100 Hz).</p>
<p dir="auto">Plankton and larvae face migration alterations and 20–50% mortality from pulses (&lt;50 Hz), potentially cascading through food webs.</p>
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<div dir="auto">
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<table dir="auto">
<thead>
<tr>
<th data-col-size="md">Species Group</th>
<th data-col-size="xl">Key Effects</th>
<th data-col-size="lg">Example Sources</th>
<th data-col-size="xs">Study References</th>
</tr>
</thead>
<tbody>
<tr>
<td data-col-size="md">Tuna</td>
<td data-col-size="xl">Schooling disruption, avoidance</td>
<td data-col-size="lg">Boats, wind farms</td>
<td data-col-size="xs">,</td>
</tr>
<tr>
<td data-col-size="md">Marine Mammals</td>
<td data-col-size="xl">Vocal changes, stress, displacement</td>
<td data-col-size="lg">Sonar, shipping</td>
<td data-col-size="xs">,</td>
</tr>
<tr>
<td data-col-size="md">Other Fish</td>
<td data-col-size="xl">Barotrauma, cortisol spikes</td>
<td data-col-size="lg">Seismic guns</td>
<td data-col-size="xs">,</td>
</tr>
<tr>
<td data-col-size="md">Crustaceans</td>
<td data-col-size="xl">Escape behaviors, metabolic stress</td>
<td data-col-size="lg">Shipping, impulses</td>
<td data-col-size="xs">,</td>
</tr>
<tr>
<td data-col-size="md">Mollusks</td>
<td data-col-size="xl">Balance disruption, valve closure</td>
<td data-col-size="lg">Seismic, construction</td>
<td data-col-size="xs">,</td>
</tr>
<tr>
<td data-col-size="md">Plankton</td>
<td data-col-size="xl">Mortality, migration shifts</td>
<td data-col-size="lg">Pulses</td>
<td data-col-size="xs"></td>
</tr>
</tbody>
</table>
<div></div>
</div>
</div>
<h2 dir="auto">Wrapping Up: A Call for Quieter Oceans</h2>
<p dir="auto">These studies reveal a noisy underwater world where low-frequency sounds can stress, injure, or displace marine life, from tuna&#8217;s disrupted migrations to plankton&#8217;s foundational impacts. While natural sounds like waves may harmonize, man-made noise demands action—think reduced vessel speeds or acoustic barriers. More research is needed on cumulative effects, but one thing&#8217;s clear: protecting these species safeguards our oceans. What do you think—should we prioritize quieter tech? Share below!</p>
<p dir="auto"><em>Sources: Compiled from recent reviews and experiments as of 2025.</em></p>
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<div>29 web pages</div>
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		<title>Sound waves affect us &#8211; even when we can not hear them</title>
		<link>https://www.seafari.se/sv/animals/diving-deeper-ulf-landstroms-1987-study-on-infrasound-and-human-effects/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Wed, 15 Oct 2025 22:45:15 +0000</pubDate>
				<category><![CDATA[Animals]]></category>
		<category><![CDATA[infra sound]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3579</guid>

					<description><![CDATA[The research "Laboratory and Field Studies on Infrasound and its Effects on Humans"—is a foundational paper by Swedish researcher Ulf Landström, published in the Journal of Low Frequency Noise and Vibration (Vol. 6, No. 1) in March 1987. It explores how infrasound (sounds below 20 Hz) impacts human perception and physiology, drawing from both  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-6 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-5 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-6"><p dir="auto">The research &#8221;Laboratory and Field Studies on Infrasound and its Effects on Humans&#8221;—is a foundational paper by Swedish researcher Ulf Landström, published in the <em>Journal of Low Frequency Noise and Vibration</em> (Vol. 6, No. 1) in March 1987. It explores how infrasound (sounds below 20 Hz) impacts human perception and physiology, drawing from both controlled lab experiments and real-world field observations. This work has been cited in later studies on topics like fatigue, animal behavior, and even occupational health standards. I&#8217;ll break it down here, including the abstract, methods, key findings, reported effects, and conclusions, to give you a comprehensive overview. Note that while influential, this is from the late &#8217;80s, so modern research has built on it with mixed results on infrasound&#8217;s health implications.</p>
<h4 dir="auto">The Abstract in Full</h4>
<p dir="auto">The paper&#8217;s abstract sets the stage: &#8221;In many working environments the total noise energy is dominated by infrasonic frequencies. Exposure to this type of low frequency noise has, by several authors, been correlated to different effects on human subjects. Recent laboratory experiments have thus indicated correlations between noise, perception and other effects on humans. Exposure to infrasound therefore appears to become a hygienic problem when the pressure level exceeds the threshold of perception. The present paper is a description of various laboratory experiments on perception and the physiological effects of infrasound. Subjects were exposed to pure tones and broad-band noise within the infrasonic range. Changes in perception, and physiological reactions, during different types of exposure are described. The paper also includes levels and frequency analyses of noise emanating from some of the most common infrasonic sources: buses, lorries, trains, railbuses, ships, helicopters, manoeuvre rooms and mills. The characteristics of the noise spectra are compared and related to the threshold of perception. Finally, field studies on physiological changes correlated to wakefulness in typical and authentic infrasonic noise environments are described.&#8221;</p>
<p dir="auto">In essence, Landström argues that infrasound becomes a workplace health issue only when it&#8217;s perceptible, linking it to various effects while emphasizing the role of perception thresholds.</p>
<h4 dir="auto">Methods: How the Research Was Conducted</h4>
<p dir="auto">Landström combined lab-based experiments with field measurements to provide a balanced view. Here&#8217;s the breakdown:</p>
<ul dir="auto">
<li>
<p dir="auto"><strong>Laboratory Setup</strong>: Tests occurred in a specialized pressure chamber (2.0 m x 1.6 m x 1.2 m) equipped with eight 50 W loudspeakers and two 100 W amplifiers to generate clean infrasound with minimal harmonics (first harmonics over 40 dB below the fundamental frequency). Background noise was kept low at 50-55 dB(lin) or below 50 dB(A). This setup acted like a Helmholtz resonator for precise control.</p>
<ul dir="auto">
<li><strong>Participants</strong>: Included 10 deaf and 10 hearing subjects in some tests to compare sensory responses.</li>
<li><strong>Exposures</strong>: Subjects faced pure tones (e.g., 6 Hz at 95-115 dB(lin) for 20 minutes; 16 Hz at 80-100 dB(lin)) and broad-band noise in the 2-20 Hz range. Some exposures were 10 dB above or below individual hearing thresholds. Additional comparisons involved low-frequency noise (42 Hz at 70 dB) vs. high-frequency (1000 Hz at 30 dB), and even EEG-regulated noise to check for brainwave synergies.</li>
<li><strong>Measurements</strong>: Hearing and vibrotactile (body vibration) thresholds were assessed using sinusoidal frequencies. Physiological responses were tracked via EEG (brain waves) for wakefulness and EKG (heart activity). Exposure durations ranged from 20-30 minutes.</li>
</ul>
</li>
<li>
<p dir="auto"><strong>Field Studies</strong>: Landström analyzed real-world infrasound sources like vehicles (buses, lorries, trains, ships, helicopters) and industrial sites (manoeuvre rooms, mills). He measured noise spectra and levels, comparing them to perception thresholds.</p>
<ul dir="auto">
<li><strong>Exposures</strong>: In authentic environments (e.g., dumpers, helicopters, railway engines), participants experienced 30-minute sessions of noise alone, vibration alone, or combined stimuli, mimicking occupational conditions.</li>
<li><strong>Focus</strong>: Emphasis on wakefulness changes in these settings, with annoyance ratings collected.</li>
</ul>
</li>
</ul>
<p dir="auto">This dual approach allowed Landström to bridge controlled science with practical applications, referencing earlier works like Johnson (1980) on thresholds and Leventhall (1980) on effects.</p>
<h4 dir="auto">Key Findings: What the Data Revealed</h4>
<p dir="auto">The study uncovered nuanced insights into infrasound&#8217;s detectability and impacts:</p>
<ul dir="auto">
<li><strong>Perception Thresholds</strong>: For pure tones, hearing thresholds were around 110 dB(lin) at 4 Hz, dropping to 90 dB(lin) at 20 Hz. Broad-band noise was detectable 1-5 dB lower. Vibrotactile sensations kicked in about 20 dB above hearing thresholds, with no difference between deaf and hearing people—suggesting it&#8217;s a body-wide response, not just auditory.</li>
<li><strong>Wakefulness and Drowsiness</strong>: Exposure above thresholds (e.g., 115 dB(lin) at 6 Hz or 100 dB(lin) at 16 Hz) reduced wakefulness in hearing subjects, as seen in EEG changes, but not in deaf ones. This points to the cochlea (inner ear) as the key mediator. Below thresholds (e.g., 95 dB(lin) at 6 Hz), no effects were observed.</li>
<li><strong>Frequency Comparisons</strong>: Low-frequency noise (42 Hz at 70 dB) promoted drowsiness, while high-frequency (1000 Hz at 30 dB) increased alertness. No strong synergy was found between infrasound and individual EEG frequencies.</li>
<li><strong>Real-World Sources</strong>: Noise from vehicles and mills often neared or exceeded perception thresholds, with combined noise-vibration exposures causing the most drowsiness and annoyance.</li>
<li><strong>Overall</strong>: Effects like reduced wakefulness were tied directly to perceiving the sound, aligning with prior theories but emphasizing no harm below audible levels.</li>
</ul>
<h4 dir="auto">Reported Effects on Humans</h4>
<p dir="auto">Landström&#8217;s work highlights a range of potential effects, but stresses they&#8217;re perception-dependent:</p>
<ul dir="auto">
<li><strong>Physiological</strong>: Reduced wakefulness and increased drowsiness (via EEG); potential links to fatigue in occupational settings. In field tests, combined infrasound and vibration led to higher annoyance and lower alertness.</li>
<li><strong>Perceptual and Psychological</strong>: Annoyance, body vibrations, and sensations like pressure. The paper notes correlations (from cited studies) to breathlessness, panic, anxiety, and even wakefulness disruptions—but Landström&#8217;s experiments focused more on drowsiness than acute panic.</li>
<li><strong>No Effects Below Threshold</strong>: Crucially, no physiological changes occurred when infrasound was sub-perceptible, countering some broader claims about &#8221;silent&#8221; effects.</li>
<li><strong>Vulnerable Groups</strong>: Hearing individuals were more affected than deaf ones, underscoring the auditory pathway&#8217;s role.</li>
</ul>
<p dir="auto">Exposure levels mentioned include 80-115 dB(lin) at frequencies like 4-20 Hz, with durations up to 30 minutes in tests (or 2 hours daily in related contexts).</p>
<h4 dir="auto">Conclusions and Lasting Impact</h4>
<p dir="auto">Landström concludes that infrasound poses hygienic risks in workplaces only when levels exceed perception thresholds, as that&#8217;s when annoyance, reduced wakefulness, and other effects emerge. He recommends larger studies on synergies (e.g., with vibrations) and highlights common sources like vehicles as potential concerns for workers. Overall, the paper supports the idea that effects are mediated by cochlear stimulation, not mysterious &#8221;inaudible&#8221; mechanisms.</p>
<p dir="auto">This research has influenced guidelines on low-frequency noise, though later reviews (e.g., by the WHO) have debated &#8221;wind turbine syndrome&#8221; links, often finding psychological factors play a role too. If you&#8217;d like me to pull up related modern studies or compare it to ocean/forest/wind turbine contexts from our earlier chats, just say the word!</p>
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		<title>The Whispering Woods: Low-Frequency Sounds in Forests and Their Impact on Human Perception</title>
		<link>https://www.seafari.se/sv/nature/the-whispering-woods-low-frequency-sounds-in-forests-and-their-impact-on-human-perception/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Wed, 15 Oct 2025 22:39:35 +0000</pubDate>
				<category><![CDATA[Nature]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3576</guid>

					<description><![CDATA[In my previous post, we explored the dual nature of low-frequency sounds (0.05–50 Hz) and infrasound—how ocean waves can lull us into tranquility while wind turbines might induce subtle stress, even if we can't consciously hear them. Today, let's venture into another natural wonder: the forest. Forests are alive with a symphony of sounds,  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-7 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-6 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-7"><p dir="auto">In my previous post, we explored the dual nature of low-frequency sounds (0.05–50 Hz) and infrasound—how ocean waves can lull us into tranquility while wind turbines might induce subtle stress, even if we can&#8217;t consciously hear them. Today, let&#8217;s venture into another natural wonder: the forest. Forests are alive with a symphony of sounds, many of which fall into this low-frequency spectrum, creating an auditory environment that&#8217;s profoundly calming for most people. Why do these woodland whispers feel so restorative compared to the mechanical hum of turbines? We&#8217;ll unpack the sources, science, and human responses, drawing parallels to our oceanic and industrial contrasts. If you&#8217;re a nature lover, this might just make your next hike even more mindful!</p>
<h2 dir="auto">What Are Low-Frequency Sounds in Forests?</h2>
<p dir="auto">Forests produce a rich tapestry of low-frequency noises through biophony (animal sounds), geophony (earthly elements like wind and water), and even subtle infrasound. These vibrations, often below 20 Hz and up to 50 Hz, aren&#8217;t always &#8221;heard&#8221; in the traditional sense but are felt as gentle pulses in the air or through the ground. Key sources include:</p>
<ul dir="auto">
<li><strong>Wind in the Trees</strong>: The rustling of leaves and branches generates broadband low-frequency noise, especially in denser canopies. Wind speeds of 5-10 m/s can create infrasound around 0.5-10 Hz, similar to ocean waves but more modulated by foliage.</li>
<li><strong>Animal Calls and Movements</strong>: Low-frequency components from owl hoots (down to 10 Hz), frog choruses, or elephant-like rumbles in tropical forests (if we&#8217;re thinking broadly). Even insect wings or distant mammal communications add to the mix.</li>
<li><strong>Water and Weather Elements</strong>: Stream gurgles, distant thunder (infrasound from lightning can dip to 0.05 Hz), or falling rain create rumbling lows that propagate through the forest floor.</li>
<li><strong>Human-Made Intrusions</strong>: Occasionally, low-frequency noise from nearby roads or logging equipment, but we&#8217;ll focus on the natural side here.</li>
</ul>
<p dir="auto">Unlike the steady drone of a turbine, forest sounds are irregular and layered, creating a dynamic soundscape that&#8217;s evolutionarily familiar—think of it as nature&#8217;s white noise, but with a green twist.</p>
<div aria-label="Forest wind rustling leaves, evoking low-frequency sounds" data-testid="image-viewer">
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<h2 dir="auto">How Humans Perceive These Sounds</h2>
<p dir="auto">Our bodies are remarkably sensitive to low-frequency forest sounds. While infrasound below 20 Hz doesn&#8217;t register in the inner ear like higher pitches, it&#8217;s detected via the vestibular system (balance organs), skin vibrations, and even the lungs&#8217; resonance around 5-10 Hz. This can lead to subconscious effects: a slight lowering of heart rate, reduced cortisol (stress hormone) levels, and enhanced alpha brain waves (8-12 Hz), much like the ocean&#8217;s influence.</p>
<p dir="auto">Studies show that exposure to forest soundscapes—rich in low frequencies—improves mood, attention, and cognitive function. For instance, &#8221;forest bathing&#8221; (shinrin-yoku in Japanese) research demonstrates that just 20-30 minutes in a woodland setting, listening to these sounds, can boost natural killer (NK) cells for immune health and alleviate anxiety. The low-frequency elements play a key role: they mask urban noise intrusions and promote a sense of enclosure and safety, triggering biophilia—our innate affinity for nature.</p>
<p dir="auto">However, perception varies. In dense forests, the &#8221;sound attenuation&#8221; (how sounds fade) creates a muffled, low-pass filter effect, emphasizing bass tones and reducing high-frequency distractions. This can feel enveloping and meditative. Contrast this with infrasound from storms: it might induce awe or mild unease, similar to how turbine hums stress some people, but the organic variability often tips it toward calm.</p>
<h2 dir="auto">The Calming Effects: Why Forests Heal</h2>
<p dir="auto">Forests stand out as a low-frequency haven for relaxation. Here&#8217;s why they differ so positively from mechanical sources:</p>
<ul dir="auto">
<li><strong>Restorative Power</strong>: A study in <em>Environmental Health and Preventive Medicine</em> found that forest sounds, with their low-frequency dominance, reduce sympathetic nervous system activity (fight-or-flight) while enhancing parasympathetic (rest-and-digest) responses. Participants reported lower blood pressure and better sleep after exposure—effects amplified by the infrasonic &#8221;hum&#8221; of wind-swayed trees.</li>
<li><strong>Brain and Body Sync</strong>: These sounds align with theta waves (4-8 Hz) for deep relaxation and creativity. Unlike the repetitive turbine pulse, which can feel intrusive and vigilance-inducing, forest lows are stochastic (randomly patterned), mimicking a safe, nurturing environment. Evolutionary psychology suggests this stems from ancestral forests providing shelter and resources.</li>
<li><strong>Therapeutic Applications</strong>: Sound therapy using recorded forest ambiences (e.g., apps like Calm or Noisli) leverages these frequencies for stress relief. One meta-analysis showed that natural low-frequency sounds outperform artificial white noise in reducing perceived stress by up to 30%.</li>
</ul>
<p dir="auto">Potential downsides? High-intensity infrasound from storms or wind gusts can cause temporary vertigo or nausea in sensitive individuals, but this is rare and short-lived compared to chronic turbine exposure.</p>
<div aria-label="Comparison table of low-frequency sound sources and effects" data-testid="image-viewer">
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<p><em>(Table: Quick Comparison – For visual clarity, here&#8217;s a simple breakdown:</em></p>
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<div dir="auto">
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<table dir="auto">
<thead>
<tr>
<th data-col-size="md">Source</th>
<th data-col-size="sm">Frequency Range</th>
<th data-col-size="lg">Typical Perception</th>
<th data-col-size="xl">Human Effects</th>
</tr>
</thead>
<tbody>
<tr>
<td data-col-size="md">Ocean Waves</td>
<td data-col-size="sm">0.05–20 Hz</td>
<td data-col-size="lg">Rhythmic, soothing</td>
<td data-col-size="xl">Relaxation, lower BP, better sleep</td>
</tr>
<tr>
<td data-col-size="md">Wind Turbines</td>
<td data-col-size="sm">0.5–50 Hz</td>
<td data-col-size="lg">Mechanical, persistent</td>
<td data-col-size="xl">Potential annoyance, stress, headaches</td>
</tr>
<tr>
<td data-col-size="md">Forest Sounds</td>
<td data-col-size="sm">0.1–30 Hz</td>
<td data-col-size="lg">Enveloping, organic</td>
<td data-col-size="xl">Mood boost, immune support, reduced anxiety</td>
</tr>
</tbody>
</table>
<div></div>
</div>
</div>
<p dir="auto"><em>This highlights how context shapes experience—natural variability wins for calm.)</em></p>
<h2 dir="auto">Contrasting with Ocean Waves and Wind Turbines</h2>
<p dir="auto">Tying back to our earlier discussion: Ocean waves and forest sounds both harness low frequencies for harmony, but forests add a biophilic layer—scents, visuals, and tactile elements amplify the auditory calm. Waves are more &#8221;open&#8221; and repetitive, ideal for meditation, while forests feel intimate and immersive, great for grounding.</p>
<p dir="auto">Wind turbines, however, represent anthrophony (human-made noise), often lacking the irregularity that makes natural sounds palatable. Research from the World Health Organization notes that while turbine infrasound levels are usually below annoyance thresholds (e.g., &lt;40 dB), the psychological context—knowing it&#8217;s &#8221;unnatural&#8221;—can heighten stress. Forests, conversely, score high on the &#8221;pleasantness&#8221; scale in psychoacoustic studies, with low frequencies contributing to a 20-40% greater relaxation response than urban or industrial noises.</p>
<h2 dir="auto">Final Thoughts: Embracing the Forest&#8217;s Low Hum</h2>
<p dir="auto">Low-frequency sounds in forests remind us of nature&#8217;s subtle power to heal, even through vibrations we barely &#8221;hear.&#8221; They offer a counterpoint to the stresses of modern life, much like ocean waves, but with an earthy, protective vibe that turbines can&#8217;t replicate. Whether you&#8217;re hiking a pine grove or listening to a forest playlist, tune into those deep rumbles—they might just recharge your soul.</p>
<p dir="auto">What low-frequency natural sounds resonate most with you? Drop a comment below, and if you&#8217;d like a deeper dive into another environment (like deserts or mountains), let me know!</p>
<p dir="auto"><em>Sources: Drawing from studies in Journal of Environmental Psychology, WHO noise guidelines, and acoustic research from sources like Acoustical Society of America. All info updated as of latest available data.</em></p>
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		<title>The Silent Symphony: How Low-Frequency Sounds from Ocean Waves and Wind Turbines Affect Us Differently</title>
		<link>https://www.seafari.se/sv/development/the-silent-symphony-how-low-frequency-sounds-from-ocean-waves-and-wind-turbines-affect-us-differently/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Wed, 15 Oct 2025 22:31:13 +0000</pubDate>
				<category><![CDATA[Development]]></category>
		<category><![CDATA[Ocean]]></category>
		<category><![CDATA[energy]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3573</guid>

					<description><![CDATA[Have you ever stood on a beach, listening to the rhythmic crash of ocean waves, feeling a profound sense of calm wash over you? Now contrast that with the distant hum of wind turbines—mechanical, persistent, and sometimes unsettling, even if you can't quite "hear" it. It's fascinating how sounds in the same low-frequency range  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-8 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-7 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-8"><p>Have you ever stood on a beach, listening to the rhythmic crash of ocean waves, feeling a profound sense of calm wash over you? Now contrast that with the distant hum of wind turbines—mechanical, persistent, and sometimes unsettling, even if you can&#8217;t quite &#8221;hear&#8221; it. It&#8217;s fascinating how sounds in the same low-frequency range (roughly 0.05–50 Hz) can evoke such polar opposite experiences. One feels like nature&#8217;s lullaby, the other like an intrusive machine. In this blog post, we&#8217;ll dive into the science of human perception of these low-frequency sounds and infrasound (typically below 20 Hz), exploring their effects on our bodies and minds. We&#8217;ll look at why ocean waves soothe while wind turbines might stress, drawing from research on both natural and man-made sources.</p>
<h2>Understanding Low-Frequency Sounds and Infrasound</h2>
<p>Low-frequency sounds range from about 20 Hz to 200 Hz, but infrasound dips even lower, below the typical human hearing threshold of 20 Hz—down to as low as 0.05 Hz in some natural phenomena. While we might not consciously &#8221;hear&#8221; these vibrations, our bodies can still perceive them through other means, like vibrations in our chest, ears, or even bones. This perception can trigger physiological responses, from subtle changes in heart rate to feelings of unease or relaxation, depending on the source.</p>
<p>Infrasound is all around us. Natural sources include earthquakes, avalanches, and yes, ocean waves, which generate infrasound through their crashing and rumbling. Man-made sources, like wind turbines, produce it through blade movements and mechanical operations. Studies show that exposure to infrasound can influence human behavior, potentially causing wakefulness, breathlessness, anxiety, or panic in high intensities. However, not all research agrees—some experiments find no significant effects on behavior or health from low-level infrasound, like 6 Hz tones. Annoyance seems to be the most common reported issue, especially from persistent sources.</p>
<h2>The Calming Effects of Ocean Waves</h2>
<p>Ocean waves are a prime example of nature&#8217;s low-frequency orchestra. The sound of waves crashing typically falls in the 7-10 Hz range, which intriguingly overlaps with human alpha brain waves (9-14 Hz), associated with relaxation and creativity. This broadband sound—meaning it has even energy distribution across frequencies—acts like natural white noise, masking distractions and promoting a sense of peace.</p>
<p>Research highlights numerous benefits: listening to ocean sounds can reduce stress, lower blood pressure, improve sleep, and even help manage tinnitus by decreasing arousal and anxiety. One study found that short-term exposure to recorded ocean waves led to small but positive changes in perception, making it a go-to for relaxation apps and therapies. It&#8217;s no wonder beach vacations are synonymous with rejuvenation—these sounds stimulate alpha waves, enhancing problem-solving and a calm state of mind.</p>
<p>But it&#8217;s not just audible; the infrasound from surf creates subtle vibrations that our bodies interpret as harmonious, perhaps echoing evolutionary ties to natural environments.</p>
<h2>The Stressful Hum of Wind Turbines</h2>
<p>On the flip side, wind turbines produce low-frequency noise and infrasound through aerodynamic effects and mechanical vibrations, often in the 0.05-50 Hz range. While most people aren&#8217;t affected, some report symptoms like headaches, sleep disturbances, or a general sense of unease when living nearby. These sensations can feel &#8221;abnormal,&#8221; as the infrasound is perceived not through hearing but as pressure or vibrations in the body.</p>
<p>The debate is heated. Some studies link wind turbine infrasound to health issues, with symptoms vanishing when people move away. Others, including expert panels, conclude that sub-audible infrasound from turbines poses no direct risk to health, with levels well below perception thresholds. Controlled experiments often show no impact on annoyance, perception, or autonomic responses. Yet, anecdotal evidence and some research suggest it could contribute to &#8221;wind turbine syndrome,&#8221; involving fatigue or anxiety.</p>
<p>The mechanical, repetitive nature might amplify stress, unlike the variable, organic patterns of waves.</p>
<h2>Why Such Different Experiences? Nature vs. Man-Made</h2>
<p>The key lies in context and characteristics. Natural sounds like ocean waves (geophony) evoke relaxation because they&#8217;re broadband, irregular, and tied to positive evolutionary associations—think safety by water sources. Brain scans show natural soundscapes enhance connectivity in ways that promote well-being, differing from urban or mechanical noises.</p>
<p>Man-made sounds, like turbine hums (anthrophony), are often steady and artificial, triggering vigilance or annoyance. Even at similar frequencies, the modulation and source matter—infrasound from turbines might mask low-frequency hearing or cause subtle physiological shifts. Long-term exposure could lead to cumulative effects, though evidence is mixed.</p>
<p>Ultimately, our brains categorize natural vs. artificial sounds differently, with nature often winning for harmony.</p>
<h2>Wrapping Up: Listening to the Unheard</h2>
<p>Low-frequency sounds and infrasound remind us how attuned we are to our environment, even beyond conscious hearing. Ocean waves offer a calming balm, while wind turbines highlight potential stressors in our quest for green energy. More research is needed to bridge the gaps in understanding, but one thing&#8217;s clear: the same frequencies can dance or drone, depending on their origin. Next time you&#8217;re by the sea or near a wind farm, tune in—what do you feel?</p>
<p>If this sparked your interest, share your experiences in the comments!</p>
<p>Here is a<a href="https://ec.europa.eu/maritimeaffairs/atlas/maritime_atlas/#lang=EN;p=w;bkgd=5;theme=88:0.75,913:0.75;c=817869.4082489441,4892463.930036435;z=7"> map of planned coastal/offshore wind turbine-installations in Europe</a>: https://ec.europa.eu/maritimeaffairs/atlas/maritime_atlas/#lang=EN;p=w;bkgd=5;theme=88:0.75,913:0.75;c=817869.4082489441,4892463.930036435;z=7</p>
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<p class="text-sm line-clamp-3"><strong>Grok used these links to help me write:</strong></p>
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<p><span class="text-sm font-semibold"><strong>Wind turbine infrasound: Phenomenology and effect on people</strong><br />
</span>Wind turbine infrasound produces perceptible vibrations and audible sound in nearby buildings. Most people are unaffected by wind turbine infrasound.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">sciencedirect.com</span></div>
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<div dir="auto">[PDF] <strong>The Effects of Infrasound on the Human Auditory System</strong></div>
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<p>The symptoms often surface when one is close to wind turbines, or an infrasound source, and disappear when the person moves away.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">docs.wind-watch.org</span></div>
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<p><span class="text-sm font-semibold"><strong>Annoyance, perception, and physiological effects of wind turbine</strong> &#8230;</span>These findings suggest that the levels of infrasound in the current study did not affect perception and annoyance or autonomic nervous system responses.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">pubs.aip.org</span></div>
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<p><span class="text-sm font-semibold">[PDF] <strong>Effects of Wind Turbine Noise on Human Health</strong> &#8211; Kansas Legislature</span>WTN contains both audible sound and infrasound. Infrasound can&#8217;t be heard by most humans, but it can be perceived as abnormal (felt) sensations &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">kslegislature.gov</span></div>
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<p><span class="text-sm font-semibold">[PDF] <strong>WIND TURBINES AND HEALTH</strong><br />
</span>The study looked at infrasound, which is “sub-audible,” or produced in a frequency range below what can be heard by humans. Proponents of negative health &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">ehsrc.public-health.uiowa.edu</span></div>
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<p><span class="text-sm font-semibold">[PDF] <strong>Wind Turbine Sound and Health Effects</strong> &#8211; An Expert Panel Review<br />
</span>Subaudible, low frequency sound and infrasound from wind turbines do not present a risk to human health. &#8230; perception and the impact of noise on human hearing &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">novoco.com</span></div>
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<p><span class="text-sm font-semibold"><strong>Wind turbines, infrasound and health</strong> &#8211; Prokon<br />
</span>&#8221;Measurements show that the infrasound from wind turbines is well below the threshold of hearing and perception,&#8221; write the experts from the Bavarian State &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">prokon.energy</span></div>
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<p><span class="text-sm font-semibold">[PDF] <strong>Wind turbines and human health</strong> &#8211; Search / Commission Files<br />
</span>Some argue that reported health effects are related to wind turbine operation [electromagnetic fields. (EMF), shadow flicker, audible noise, low &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">documents.dps.ny.gov</span></div>
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<p><span class="text-sm font-semibold"><strong>No evidence to show that infrasound from wind turbines is harmful to &#8230;</strong><br />
</span>Controlled studies have not found any evidence linking infrasound noise to annoyances, sleep disturbances, or any other symptoms.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">science.feedback.org</span></div>
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<p><span class="text-sm font-semibold"><strong>The Connection Between Ocean Waves and Hearing Wellness</strong><br />
</span>Research shows that ocean sounds can reduce stress, improve sleep patterns, and even help with tinnitus management. Understanding the relationship between &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">hearpalmbeach.com</span></div>
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<p><span class="text-sm font-semibold"><strong>Catching the Waves: Why the Sound of Water Soothes Us</strong> | St. Louis &#8230;<br />
</span>Most water features create broadband sound, which means the sound has equal amounts of energy at most audible frequencies.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">stlmag.com</span></div>
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<p><span class="text-sm font-semibold"><strong>The short-term effects of recorded ocean sound with and without &#8230;</strong><br />
</span>Short-term exposure to ocean wave sound recordings resulted in small changes in tinnitus perception. The sounds reduced arousal and anxiety.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">sciencedirect.com</span></div>
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<p><span class="text-sm font-semibold"><strong>How ocean waves heal your nervous system</strong> &#8211; Facebook<br />
</span>These brain waves range from 9 to 14 Hz (cycles per second). Interestingly enough, the sound waves of the ocean range from 7 to 10 Hz (cycles &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">facebook.com</span></div>
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<p><span class="text-sm font-semibold"><strong>The short-term effects of recorded ocean sound</strong> with and &#8230; &#8211; PubMed<br />
</span>Conclusion: The addition of binaural beats at 8 Hz to an ocean sound showed no significant group benefits above the ocean sound alone.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">pubmed.ncbi.nlm.nih.gov</span></div>
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<p><span class="text-sm font-semibold">SOUNDS of OCEAN | 639Hz + 432Hz Music to Calm your Heart<br />
</span>Immerse yourself in the sounds of ocean along with the music composed in the heart chakra (Anahata) frequency 639Hz and 432Hz &#8211; the natures &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">youtube.com</span></div>
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<p><span class="text-sm font-semibold"><strong>21 Reasons to Listen to Crashing Waves</strong> &#8211; Your Ultimate Guide to &#8230;<br />
</span>Listening to ocean sounds stimulates your brain&#8217;s alpha waves, the frequency linked to creativity and problem-solving. 6. Nature&#8217;s White Noise.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">solgoodmedia.com</span></div>
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<p><span class="text-sm font-semibold"><strong>Why are Ocean Sounds Calming?</strong> &#8211; PADI Blog<br />
</span>Researchers have found that listening to water sounds reduces our stress levels, lowers blood pressure, and encourages a sense of calmness.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">blog.padi.com</span></div>
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<p><span class="text-sm font-semibold"><strong>Scientists tune in to the surf&#8217;s hidden signals</strong> &#8211; UC Santa Barbara News<br />
</span>The low rumble of the waves. The surf produces infrasound and seismic waves in addition to the higher frequency sound we hear at the beach.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">news.ucsb.edu</span></div>
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<p><span class="text-sm font-semibold"><strong>Auditory Categorization of Man-Made Sounds Versus Natural &#8230;</strong><br />
</span>Our analyses demonstrated significant activation and interconnection differences between living and man-made object sounds.</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">pmc.ncbi.nlm.nih.gov</span></div>
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<p><span class="text-sm font-semibold"><strong>Nature sounds and human well-being</strong> &#8211; Earth.fm<br />
</span>Modern soundscapes show that natural sounds predominantly comprise biophony and geophony, while the artificial soundscape primarily comprises &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">earth.fm</span></div>
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<p><span class="text-sm font-semibold"><strong>What is the difference between natural frequencies and man-made &#8230;</strong><br />
</span>Definition: Natural frequencies refer to the frequencies that occur in the environment without direct human intervention. These can include &#8230; medium.com</p>
<p class="text-sm line-clamp-3"><strong>Impact of exposure to natural versus urban soundscapes on brain</strong> &#8230;<br />
This study provides a framework for the neural underpinnings of how natural versus urban soundscapes affect both whole brain FC and BEN.<br />
sciencedirect.com</p>
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<p><span class="text-sm font-semibold"><strong>Physiological and Psychological Effects of Forest and Urban Sounds</strong> &#8230;<br />
</span>Thus, the forest sound evoked a more relaxed feeling than the city sound. Further, for the natural–artificial scale, the mean score was “ &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">pmc.ncbi.nlm.nih.gov</span></div>
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<div class="flex flex-col gap-1 px-4 py-3 max-w-full" dir="auto"><span class="text-sm font-semibold"><strong>Noise level from natural sources</strong> (excluding humans and &#8230; &#8211; Reddit<br />
</span>This map was created by the National Park Service to show how loud places would be if took humans and human activity out of the picture. <span class="text-xs text-secondary truncate flex-1">reddit.com</span></div>
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<p><span class="text-sm font-semibold"><strong>Understanding Sound &#8211; Natural Sounds</strong> (U.S. National Park Service)<br />
</span>A drum beat has a much lower frequency than a whistle, and a bullfrog call has a lower frequency than a cricket. The lower the frequency, the &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">nps.gov</span></div>
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<p><span class="text-sm font-semibold"><strong>A comparison of noise sources versus frequency ranges of each &#8230;</strong><br />
</span>There was no evidence that the magnitude of the observed response differed between natural and anthropogenic sources. The probability of a humpback whale &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">researchgate.net</span></div>
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<p><span class="text-sm font-semibold"><br />
Nature Sounds vs. White Noise: Which is Better for Focus? &#8211; Freedom<br />
</span>Nature sounds might transport you to a peaceful forest, while white noise offers a consistent, distraction-free backdrop.<br />
freedom.to</p>
<p class="text-sm line-clamp-3"><strong>[PDF] Natural and Urban Sounds in Soundscapes<br />
</strong>This research study explores the differences between various natural and urban environmental sounds from the viewpoint of objective measures. Moreover &#8230;<br />
etheses.whiterose.ac.uk</p>
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<p><span class="text-sm font-semibold"><strong>A longitudinal, randomized experimental pilot study to investigate &#8230;</strong><br />
</span>Our study broadly suggests that inaudible (6 Hz) IS does not affect human behavior per se, including a range of health-related and &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">pmc.ncbi.nlm.nih.gov</span></div>
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<p><span class="text-sm font-semibold">[PDF] <strong>Physiological and psychological effects of infrasound on humans<br />
</strong></span>There is a widespread opinion that infrasound may disturb human body functions and influence the per- formance of humans.<br />
vbn.aau.dk</p>
<p class="text-sm line-clamp-3"><strong>Effects of infrasound on the perception of a low-frequency sound</strong><br />
Infrasound masks low-frequency sound detection by 4.6 dB and increases modulation depth by 3.2-3.9 dB, affecting low audio-frequency perception.<br />
acta-acustica.edpsciences.org</p>
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<p><span class="text-sm font-semibold"><strong>Evaluation of Low-Frequency Noise, Infrasound, and Health &#8230;</strong><br />
</span>Studies have shown noise-related annoyance as one of the main effects from exposure to low-frequency sound and infrasound. In addition, some case reports &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">pmc.ncbi.nlm.nih.gov</span></div>
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<p><span class="text-sm font-semibold"><strong><br />
Laboratory and Field Studies on Infrasound and its Effects on Humans</strong><br />
</span>Exposure to infrasound in humans appears to produce myriad effects including wakefulness (Landström 1987) , breathlessness, panic, anxiety, and &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">researchgate.net</span></div>
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<p><span class="text-sm font-semibold"><strong>Effects of Low Frequency Noise on Man &#8211; A Case Study</strong><br />
</span>Based on a real case effects of long-term exposure of infrasound on man are outlined. Beside a description of the background of the case together with &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">journals.lww.com<br />
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<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1"><strong>[PDF] Biological Effects of Low Frequency Acoustic Oscillations and Their ..</strong>.<br />
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<p>Infrasound, below 20 Hz, is widely disseminated in the environment, and its intensity is increasing due to modern technologies. It is found in natural events &#8230;</p>
<div class="flex items-center gap-2"><span class="text-xs text-secondary truncate flex-1">docs.wind-watch.org</span></div>
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<div class="flex flex-col gap-1 px-4 py-3 max-w-full" dir="auto"><span class="text-sm font-semibold">[PDF] <strong>Physiological and psychological effects of infrasound on humans</strong><br />
</span>Sixteen subjects were exposed for three hours to inaudible infrasound, audible infra- sound, traffic noise and a quiet control condition, &#8230;<br />
scispace.com</div>
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<div class="flex flex-col gap-1 px-4 py-3 max-w-full" dir="auto"><span class="text-sm font-semibold"><strong>Does Stochastic and Modulated Wind Turbine Infrasound Affect &#8230;</strong><br />
</span>The present study investigates the influence of wind turbine infrasound and low frequency noise (LFN) on human well-being.<br />
mdpi.com</div>
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		<title>The Symphony of the Sea: Are Offshore Wind Farms Drowning Out the Voices of Tuna and Orcas?</title>
		<link>https://www.seafari.se/sv/development/the-symphony-of-the-sea-are-offshore-wind-farms-drowning-out-the-voices-of-tuna-and-orcas/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Wed, 15 Oct 2025 21:38:19 +0000</pubDate>
				<category><![CDATA[Animals]]></category>
		<category><![CDATA[Development]]></category>
		<category><![CDATA[Nature]]></category>
		<category><![CDATA[Ocean]]></category>
		<category><![CDATA[orca]]></category>
		<category><![CDATA[tuna]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=3570</guid>

					<description><![CDATA[Imagine the vast Atlantic Ocean as a grand orchestra, where the deep bass rumbles of schooling tuna blend with the high-pitched clicks of hunting orcas. For millions of years, this underwater symphony has guided migrations, hunts, and family bonds. But in the last decade, a new instrument has joined the ensemble: the relentless hum  [...]]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-9 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-8 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-9"><p>Imagine the vast Atlantic Ocean as a grand orchestra, where the deep bass rumbles of schooling tuna blend with the high-pitched clicks of hunting orcas. For millions of years, this underwater symphony has guided migrations, hunts, and family bonds. But in the last decade, a new instrument has joined the ensemble: the relentless hum of offshore wind farms. These towering turbines, hailed as green saviors against climate change, emit low-frequency drones that could be muting the ocean&#8217;s natural chorus. And on the U.S. East Coast, a heartbreaking timeline of beached whales suggests our &#8221;progress&#8221; might be hitting a sour note. Could these majestic creatures be sending a desperate SOS? Let&#8217;s dive into the frequencies at play—and why we might need to retune our turbines before the music stops.</p>
<h2>The Tuna&#8217;s Low-Key Rhythm: Communication and Hunting in the Depths</h2>
<p>Bluefin tuna, the silver rockets of the sea and a primary prey for Iberian orcas off Portugal, aren&#8217;t known for elaborate songs like whales. Instead, they rely on subtle acoustic cues to coordinate massive schools and ambush prey. These fast-swimming giants produce and detect sounds in the low-frequency range, where the ocean&#8217;s ambient hum is already thick with shipping noise.</p>
<p>Research shows that tuna generate pulses during feeding frenzies or struggles, often between 20 and 130 Hz—deep, throbbing vibrations that signal danger, opportunity, or group cohesion. Their hearing peaks even higher, around 400-500 Hz, with sensitivity dropping sharply beyond 800 Hz, allowing them to pick up on the grunts and thumps of nearby fish or predators. In a quiet sea, these signals travel for kilometers, helping tuna maintain tight formations during their annual migrations through the Strait of Gibraltar. But introduce human noise, and the signal gets lost in the static. Boat engines alone can mask these calls, scattering schools and turning a coordinated hunt into chaos.</p>
<p>For orcas shadowing these tuna runs, disrupted prey communication means harder foraging. It&#8217;s like trying to eavesdrop on a conversation in a crowded subway—vital intel drowned out before it reaches you.</p>
<h2>Orcas&#8217; High-Wire Act: Echolocation and Calls in a Noisy World</h2>
<p>Killer whales, or orcas, are the ocean&#8217;s acoustic virtuosos. They use a repertoire of clicks, whistles, and pulsed calls for everything from pinpointing a tuna&#8217;s location to coordinating pod hunts or simply saying &#8221;hello&#8221; across miles of water. Their echolocation clicks—the sonar pings that map the seafloor and spot elusive prey—span 10 to 110 kHz, with peak sensitivity between 15 and 42 kHz. That&#8217;s ultrasonic territory for humans, far above our hearing but crystal clear to these black-and-white maestros.</p>
<p>Communication calls dip lower, from 0.5 to 30 kHz, allowing pods to &#8221;chat&#8221; during travels. In the wild, this toolkit lets orcas like the endangered Iberian subpopulation off Portugal execute balletic tuna takedowns. But vessel noise, peaking in the 100-1,000 Hz range, bleeds into their lower calls, creating an auditory fog that stresses mothers and calves alike. Echolocation fares better at higher frequencies, but cumulative noise from shipping and construction can still overwhelm, leading to fatigue, misfires in hunts, and even those bizarre sailboat &#8221;attacks&#8221; since 2020—perhaps a frustrated echo of disrupted lives.</p>
<h2>The Turbine&#8217;s Persistent Drone: Frequencies from Portugal&#8217;s WindFloat Atlantic</h2>
<p>Enter the floating offshore wind farms, like Portugal&#8217;s pioneering WindFloat Atlantic, operational since 2020 off Viana do Castelo. This 25 MW array of semi-submersible turbines was a breakthrough for deep-water renewables, generating clean power for 20,000 homes without the seabed-pounding foundations of fixed farms. But beneath the waves, its soundtrack is less harmonious.</p>
<p>Operational noise from floating turbines like these centers on low frequencies below 200 Hz—a continuous hum from blades and generators, often peaking around 198 Hz. Levels can hit 145-149 dB re 1 µPa at the source, fading to 100 dB over 60+ km in calm conditions. Mooring lines add sporadic snaps up to 48 kHz, overlapping orca whistles.</p>
<p>This low-end rumble directly clashes with tuna&#8217;s 20-500 Hz world, potentially masking schooling signals and scattering prey just as orcas arrive for dinner. For orcas, it&#8217;s more indirect: the hum blends into shipping noise, but in tuna-rich corridors, it could amplify stress, forcing pods into riskier nearshore foraging. Studies on Scottish floating farms (Hywind and Kincardine) show no mass displacements yet, but long-term data is thin—especially for vulnerable groups like Iberian orcas. As Portugal eyes 10 GW more by 2030, the chorus of turbines could turn migration routes into echo chambers of confusion.</p>
<h2>East Coast Whales: A Timeline of Strandings and Spinning Blades</h2>
<p>Across the Atlantic, the U.S. East Coast tells a tale of temporal tragedy. Since January 2016, an Unusual Mortality Event (UME) has claimed over 200 humpback whales from Maine to Florida, with necropsies revealing propeller scars and fishing gear entanglements as culprits. North Atlantic right whales joined the crisis in 2017, with 17 deaths that year alone—mostly from vessel strikes. By 2025, the humpback UME lingers, with 28 strandings in Rhode Island and Massachusetts in 2024 alone.</p>
<p>Now, overlay the offshore wind timeline: America&#8217;s first farm, Block Island (30 MW, Rhode Island), went live in December 2016—months after the humpback UME began. Coastal Virginia&#8217;s 12 MW pilot followed in 2020, amid rising deaths. South Fork Wind (132 MW, New York) hit full operations in 2024, as Vineyard Wind began delivering power off Massachusetts. By March 2025, U.S. capacity reached 174 MW, with 43 GW in the pipeline.</p>
<h2>| Year | Key Whale Events | Offshore Wind Milestones |</h2>
<p>|&#8212;&#8212;|&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;|&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;|</p>
<p>| 2016 | Humpback UME starts (Jan); ~20 deaths | Block Island operational (Dec, 30 MW) |</p>
<p>| 2017 | Right whale UME begins; 17 deaths | Planning ramps up; no new ops |</p>
<p>| 2018-2019 | Humpback deaths peak (~50/year) | Leases awarded; construction delays |</p>
<p>| 2020 | CVOW pilot online; COVID slows strandings | CVOW operational (12 MW) |</p>
<p>| 2021-2023 | ~100 total humpback deaths; right whale crisis | Vineyard/South Fork construction; 5 projects cancelled amid costs |</p>
<p>| 2024-2025 | 28 RI/MA strandings (2024); UMEs ongoing | South Fork full ops (132 MW); Vineyard delivering; total 174 MW |</p>
<p>Coincidence? NOAA attributes deaths to booming whale populations meeting denser ship traffic (up 27% since 2019) and gear entanglements, not wind surveys. Yet the overlap is uncanny: strandings surged as turbines spun up, and construction noise (up to 250 dB at 10-1,000 Hz) echoes tuna-disrupting lows. Could cumulative acoustic chaos—wind hum plus propellers—be pushing whales into harm&#8217;s way? It&#8217;s a correlation screaming for causation studies.</p>
<h2>Retuning the Ocean: A Call for Quieter Waves</h2>
<p>The sea&#8217;s big animals aren&#8217;t attacking boats out of spite or beaching themselves for attention—they&#8217;re adrift in a noise storm we&#8217;ve unleashed. Tuna schools fracture under 200 Hz drones, orcas strain to &#8221;hear&#8221; amid the din, and East Coast whales wash up as turbines multiply. Offshore wind is vital for slashing emissions, but if we ignore the frequencies, we risk silencing the ocean&#8217;s soul.</p>
<p><strong>The fix? Innovate.</strong> Shift turbine designs to higher frequencies above 1 kHz, where they skirt tuna senses and orca calls—perhaps via advanced blade coatings or active noise cancellation. Mandate real-time acoustic monitoring at farms like WindFloat Atlantic, and pause expansions in migration hotspots until we map safe soundscapes. Governments, from Lisbon to Washington, must fund cetacean-safe tech, just as we&#8217;ve quieted aircraft for birds.</p>
<p>The ocean&#8217;s orchestra is irreplaceable. Let&#8217;s listen to its pleas and compose a harmony where renewables and wildlife thrive. What frequency will you amplify? Share your thoughts below—our seas depend on it.</p>
<p><strong>Sources and further reading</strong>:<br />
NOAA Fisheries UME reports, Tethys Marine Energy Database, and acoustic studies from Frontiers in Marine Science.*</p>
<p>Based on reliable sources, here&#8217;s a quick summary of the key frequency ranges I pulled together for each element you mentioned (focusing on underwater sound production or sensitivity where applicable, as these are often discussed in the context of marine noise pollution affecting species like orcas). I used logarithmic scaling in mind for the diagram (e.g., from 10 Hz to 200 kHz) to show overlapping or distinct bands clearly.</p>
<table cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td valign="middle"><b>Category</b></td>
<td valign="middle"><b>Frequency Range</b></td>
<td valign="middle"><b>Notes</b></td>
</tr>
<tr>
<td valign="middle">Bluefin tuna (hearing sensitivity; vocalizations are minimal/rare)</td>
<td valign="middle">100–800 Hz (most sensitive around 400–500 Hz)</td>
<td valign="middle">Tuna primarily detect low-to-mid frequencies; limited vocal output around 100–500 Hz.</td>
</tr>
<tr>
<td valign="middle">Orcas (vocalizations)</td>
<td valign="middle">0.5–40 kHz</td>
<td valign="middle">Communication calls and whistles fall in this band.</td>
</tr>
<tr>
<td valign="middle">Orcas (echolocation)</td>
<td valign="middle">15–40 kHz (up to 125 kHz hearing range)</td>
<td valign="middle">High-frequency clicks for hunting/navigation.</td>
</tr>
<tr>
<td valign="middle">Offshore wind farms (operational noise, including WindFloat Atlantic and floating parks generally)</td>
<td valign="middle">&lt;200 Hz (often peaking around 100–200 Hz, dominant &lt;100 Hz)</td>
<td valign="middle">Low-frequency tonal and broadband noise from turbine operation and moorings; varies with wind/rotor speed.</td>
</tr>
<tr>
<td valign="middle">Container ship traffic (shipping noise)</td>
<td valign="middle">20–1,000 Hz (dominant 50–500 Hz, up to 10 kHz broadband)</td>
<td valign="middle">Propeller cavitation and engine noise; low-frequency dominant in busy shipping lanes.</td>
</tr>
<tr>
<td valign="middle">Fishing vessel sonars (fish finders)</td>
<td valign="middle">20–200 kHz (common: 50 kHz low, 200 kHz high)</td>
<td valign="middle">Dual-frequency systems for depth and target resolution; higher for shallow/inshore.</td>
</tr>
<tr>
<td valign="middle">Military sonars (naval)</td>
<td valign="middle">0.1–10 kHz+ (low: 100–500 Hz; mid: 1–10 kHz; high: &gt;10 kHz)</td>
<td valign="middle">Varied by type (e.g., low for long-range detection, mid/high for accuracy); active systems can be intense.</td>
</tr>
</tbody>
</table>
<p><i>Note</i>: Overlaps between human-generated noise (e.g., shipping, wind farms) and orca vocalizations (0.5–40 kHz) or echolocation (15–40 kHz) may disrupt communication and navigation. Fishing and military sonars also overlap with orca echolocation frequencies, potentially causing disturbance.</p>
<p>🌊<b> Summary Table Orcas</b></p>
<table cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td valign="middle"><b>Purpose</b></td>
<td valign="middle"><b>Sound Type</b></td>
<td valign="middle"><b>Frequency (kHz)</b></td>
<td valign="middle"><b>Notes</b></td>
</tr>
<tr>
<td valign="middle">Communication</td>
<td valign="middle">Calls, whistles, clicks</td>
<td valign="middle">0.5–25</td>
<td valign="middle">Used for identification and group cohesion</td>
</tr>
<tr>
<td valign="middle">Echolocation</td>
<td valign="middle">Click trains</td>
<td valign="middle">20–120 (up to 160)</td>
<td valign="middle">Builds a 3D “acoustic image”</td>
</tr>
<tr>
<td valign="middle">Hunting</td>
<td valign="middle">Clicks + coordinated calls</td>
<td valign="middle">20–100</td>
<td valign="middle">Adjusted for prey type and environment</td>
</tr>
<tr>
<td valign="middle">Long-distance contact</td>
<td valign="middle">Low-frequency calls</td>
<td valign="middle">1–5</td>
<td valign="middle">Travels several kilometers</td>
</tr>
</tbody>
</table>
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		<title>Naturen som vår inspiration för innovation</title>
		<link>https://www.seafari.se/sv/innovation/naturen-som-var-inspiration-for-innovation/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Wed, 15 Oct 2025 20:53:50 +0000</pubDate>
				<category><![CDATA[Innovation]]></category>
		<category><![CDATA[Nature]]></category>
		<guid isPermaLink="false">https://www.seafari.se/?p=2438</guid>

					<description><![CDATA[Många av världens innovationer kommer från att ha studerat hur naturen löst liknade problem. Velcro, och fler exempel. Här är en bra text från the guardian att utveckla fler lösningar: https://www.theguardian.com/environment/2022/nov/23/velcro-bullet-trains-and-robotic-arms-nature-mother-of-invention-aoe?mc_cid=048508f264&amp;mc_eid=dc81692d56 av Phoebe Weston @phoeb0 Wed 23 Nov 2022 07.00 GMT]]></description>
										<content:encoded><![CDATA[<div class="fusion-fullwidth fullwidth-box fusion-builder-row-10 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling" style="--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;" ><div class="fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap" style="max-width:1248px;margin-left: calc(-4% / 2 );margin-right: calc(-4% / 2 );"><div class="fusion-layout-column fusion_builder_column fusion-builder-column-9 fusion_builder_column_1_1 1_1 fusion-flex-column" style="--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;"><div class="fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column"><div class="fusion-text fusion-text-10"><p>Många av världens innovationer kommer från att ha studerat hur naturen löst liknade problem. Velcro, och fler exempel.<br />
Här är en bra text från the guardian att utveckla fler lösningar:</p>
<p><a href="https://www.theguardian.com/environment/2022/nov/23/velcro-bullet-trains-and-robotic-arms-nature-mother-of-invention-aoe?mc_cid=048508f264&amp;mc_eid=dc81692d56">https://www.theguardian.com/environment/2022/nov/23/velcro-bullet-trains-and-robotic-arms-nature-mother-of-invention-aoe?mc_cid=048508f264&amp;mc_eid=dc81692d56</a></p>
<p>av</p>
<div class="dcr-1b2hahh"><img decoding="async" class="dcr-1wujxfx" src="https://i.guim.co.uk/img/uploads/2022/08/30/Phoebe_Weston.png?width=300&amp;quality=85&amp;auto=format&amp;fit=max&amp;s=45b6dcd59591164b268cfbe0049e32eb" alt="Phoebe Weston" /></div>
<div>
<address aria-label="Contributor info" data-component="meta-byline" data-link-name="byline">
<div class=" dcr-2ntycz"><a href="https://www.theguardian.com/profile/phoebe-weston" rel="author" data-link-name="auto tag link">Phoebe Weston</a></div>
<div class="dcr-82s980"><a href="https://www.twitter.com/phoeb0" aria-label="@phoeb0 on Twitter">@phoeb0</a></div>
</address>
<details class="dcr-1akpejr">
<summary class="dcr-1jfftff"><span class="dcr-10i63lj">Wed 23 Nov 2022 07.00 GMT</span></summary>
</details>
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