The Science Behind Ghostly Encounters: How Infrasound Shapes Perceptions of Hauntings

<div> <h2 id="what-is-infrasound">Understanding Infrasound and Its Sources</h2> <p>Have you ever walked into an old building and felt an unexplained chill, a sense of being watched, or a sudden unease? Many attribute such sensations to ghostly presences, but science offers a more down-to-earth explanation. A recent study published in <em>Frontiers in Behavioral Neuroscience</em> suggests that infrasound—sound waves below 20 hertz—could be the hidden culprit behind these common experiences.</p><figure style="margin:20px 0"><img src="https://cdn.arstechnica.net/wp-content/uploads/2026/04/infrasound2-1152x648.jpg" alt="The Science Behind Ghostly Encounters: How Infrasound Shapes Perceptions of Hauntings" style="width:100%;height:auto;border-radius:8px" loading="lazy"><figcaption style="font-size:12px;color:#666;margin-top:5px">Source: arstechnica.com</figcaption></figure> <h3 id="definition">What Is Infrasound?</h3> <p>Infrasound is a low-frequency wave that our ears cannot consciously hear, though our bodies can feel it as a rumble or pressure. It occurs naturally in environments—from thunderstorms and ocean waves to larger animals like elephants—and artificially through machinery, traffic, and even ventilation systems. Because it is inaudible, infrasound often goes unnoticed, yet it can significantly influence our physical and emotional state.</p> <h3 id="common-sources">Common Sources of Infrasound in Everyday Environments</h3> <ul> <li><strong>Vibrating pipes</strong> in plumbing systems</li> <li><strong>Mechanical and climate control systems</strong> in buildings</li> <li><strong>Traffic rumble</strong> from nearby roads</li> <li><strong>Wind turbines</strong> and other industrial equipment</li> <li><strong>Natural phenomena</strong> like wind brushing against structures</li> </ul> <p>Each of these can generate infrasound without our awareness, potentially triggering feelings of anxiety, pressure, or even a sense of a presence—exactly the kinds of sensations often reported in allegedly haunted locations.</p> <h2 id="research">Research Linking Infrasound to Perceived Hauntings</h2> <p>Scientists have long sought logical explanations for paranormal experiences. The new paper from <em>Frontiers in Behavioral Neuroscience</em> pulls together decades of research to argue that infrasound is a major factor behind many ghostly encounters. One of the most cited studies in this field was conducted by psychologist Richard Wiseman in 2003.</p> <h3 id="wiseman-studies">The 2003 Studies by Richard Wiseman</h3> <p>Wiseman led two experiments at sites famous for paranormal claims: Hampton Court Palace in England and the South Bridge Vaults in Scotland. Participants walked through these locations and recorded where they felt strange presences or unexplained phenomena. The results showed that people reported more peculiar experiences in areas that were rumored to be haunted—even if they didn't know those rumors. Critically, these same areas also had measurable differences in magnetic fields, humidity, and lighting. Wiseman proposed that such environmental factors, rather than ghosts, account for the sensations.</p> <h3 id="brain-effects">How Infrasound Affects the Brain</h3> <p>Infrasound can physically resonate with the human body, vibrating organs like the chest cavity and even the inner ear's fluid, which is responsible for balance. This can produce dizziness, pressure, and a feeling of unease. Some studies have shown that infrasound may also trigger brain regions linked to anxiety and threat detection. Similar to how electrical stimulation of the angular gyrus can make someone feel another person behind them, infrasound could mimic that effect by subtly altering neural activity. When combined with other factors like low light or unusual magnetic fields, it becomes easy to see how a normal environment could feel eerie.</p><figure style="margin:20px 0"><img src="https://cdn.arstechnica.net/wp-content/uploads/2026/04/infrasound2-640x431.jpg" alt="The Science Behind Ghostly Encounters: How Infrasound Shapes Perceptions of Hauntings" style="width:100%;height:auto;border-radius:8px" loading="lazy"><figcaption style="font-size:12px;color:#666;margin-top:5px">Source: arstechnica.com</figcaption></figure> <h2 id="implications">The Broader Implication: Infrasound as a Natural Explanation</h2> <p>The takeaway from this research is not that hauntings don't exist, but that many can be explained by ordinary physical stimuli. Understanding <a href="#what-is-infrasound">what infrasound is</a> and where it occurs helps demystify ghostly reports without dismissing personal experiences.</p> <h3 id="why-trigger">Why Infrasound May Trigger Ghostly Sensations</h3> <p>Infrasound at certain frequencies can feel like a low rumble or throb that might be misinterpreted as a supernatural presence. In controlled experiments, subjects exposed to infrasound reported increased arousal, sadness, and even visual disturbances. When these feelings occur in a dim, creaky old building, the mind often provides a narrative of haunting. This is a classic case of <em>anomaly attribution</em>—our brain seeks causes for unexplained bodily signals.</p> <h3 id="debunking">Debunking Hauntings with Science</h3> <p>Rather than disproving the paranormal, this study enriches our understanding of human perception. It shows that what feels supernatural often has a natural root—like air currents, electromagnetic fields, or infrasound. For those investigating alleged hauntings, measuring these environmental factors should be a first step. The next time you step into a "haunted" house, pause and check for vibrating pipes or low‑frequency rumbles. You might discover that science, not spirits, is behind the eerie sensations.</p> <p>If you'd like to read the original research in detail, revisit <a href="#research">the earlier section on Wiseman's studies</a>.</p> </div>