Within Infrasound
Why UFO Witnesses Report Chest Pressure
Low-frequency sound may help explain why some witnesses report chest pressure, resonance, or a felt presence during sightings.
On this page
- What chest pressure reports usually describe
- How low frequency sound can affect the body
- Where the explanation becomes uncertain
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Introduction
Many UFO witnesses describe a sensation that feels less like hearing a sound and more like being physically affected by something in the air. One of the most common reports is pressure in the chest: a feeling of heaviness, vibration, tightness, internal resonance or an invisible force pressing against the body. In some accounts, this sensation appears before a witness notices any obvious noise at all.
Low-frequency sound, especially infrasound below about 20 hertz, is often discussed as a possible explanation. Researchers have shown that very low-frequency vibrations can affect the body even when people do not consciously hear them. The idea does not prove that UFO sightings are caused by sound waves, nor does it explain every report. However, it offers a plausible mechanism for why some witnesses describe chest pressure, unease and a powerful sense of presence during unusual aerial events. [Wikipedia]WikipediaSource details in endnotes.
What Chest Pressure Reports Usually Describe
In UFO narratives, chest pressure is rarely described as ordinary pain. Witnesses more often report:
- A deep internal vibration.
- A sensation that the chest is being compressed.
- Difficulty taking a comfortable breath.
- A feeling that the body is resonating with something nearby.
- Pressure accompanied by fear, dread or heightened alertness.
- The impression that a large object is present even when little sound is heard.
What makes these reports notable is that the sensation often seems mechanical rather than emotional. Witnesses frequently distinguish it from simple fear. They describe the pressure as something happening to them physically, not merely anxiety caused by seeing something unusual.
This distinction is one reason infrasound has attracted attention in discussions of UFO-related bodily effects. Low-frequency sound can be experienced as vibration, pressure or movement rather than as a conventional audible tone. At high enough intensities, people may feel the sound through the body before they consciously recognise it as noise. [Wikipedia]WikipediaSource details in endnotes.
How Low-Frequency Sound Can Affect the Body
The proposed mechanism centres on the unusual behaviour of long-wavelength sound waves.
Infrasound occupies frequencies below the normal hearing range. Human hearing becomes progressively less sensitive as frequency drops, meaning that a powerful infrasonic signal may be sensed physically even when it is barely audible. Researchers studying low-frequency noise have documented reports of pressure sensations, bodily vibration, annoyance, discomfort and stress responses during exposure. [PMC]pmc.ncbi.nlm.nih.govPMCEvaluation of Low-Frequency Noise, Infrasound, and Health…by SK Chiu · 2023 · Cited by 7 — Studies have shown noise-related annoyan…
Some scientists have suggested that low-frequency sound can interact with natural resonances within the body. Research on infrasound and human physiology notes that many bodily vibrations occur within similar frequency ranges, roughly between 5 and 40 hertz. Because of this overlap, certain frequencies may be perceived more strongly than ordinary sound. [Springer Nature Link]link.springer.comSpringer Nature LinkInfrasound, human health, and adaptation: an integrative…by MA Persinger · 2014 · Cited by 85 — Infrasound display…
The chest is particularly relevant because it is a large cavity containing air-filled lungs and constantly moving tissues. Experimental research on low-frequency noise has reported chest resonance effects during exposure to strong low-frequency sound fields. Aviation and industrial studies have also documented sensations of vibration or pressure in the thoracic region under certain acoustic conditions. [Moving Forward Network]movingforwardnetwork.orgMoving Forward Network Effects of Low Frequency Noise and VibrationsMoving Forward NetworkEffects of Low Frequency Noise and VibrationsApril 20, 2023 — 6 Oct 2017 — A marked resonance around 60 Hz of the c…
This does not mean that every low-frequency sound produces chest pressure. The effect depends on factors such as frequency, sound intensity, duration, individual sensitivity and the surrounding environment. Nevertheless, the mechanism offers a concrete explanation for why a witness might feel a bodily force without identifying a conventional source.
Why Chest Pressure Often Appears Alongside a Felt Presence
One of the more intriguing aspects of UFO reports is that chest pressure is often accompanied by a powerful feeling that “something is there”.
Researchers studying unusual environmental sensations have repeatedly noted that infrasound can contribute to feelings of unease, anxiety and heightened awareness. Some experiments suggest that people exposed to low-frequency vibrations may experience increased stress responses even when they cannot consciously detect the sound. Recent laboratory work found elevated cortisol levels and increased irritability during hidden infrasound exposure, despite participants being unable to reliably identify when the sound was present. [The Guardian]theguardian.comResearchers discovered that even though participants could not consciously hear infrasound, exposure led to increased irritability, eleva…
This combination matters because human perception does not neatly separate physical sensation from interpretation. If a person suddenly feels chest pressure, vibration and unexplained discomfort while observing an unusual light or object, the brain naturally attempts to connect those experiences.
The result can be a powerful impression that the object itself is exerting an influence. Even if the physical sensation originated from an environmental acoustic source, the witness may reasonably associate it with whatever unusual event is occurring at the same moment.
Researchers investigating allegedly haunted environments have proposed a similar process. In these cases, unexplained bodily sensations can become attached to paranormal interpretations because people seek an explanation for a physical feeling they cannot identify. [Wind Watch Documentation]docs.wind-watch.orgWind Watch Documentation Something in the CellarWind Watch DocumentationSomething in the CellarApril 26, 2005 — by V Tandy · Cited by 85 — This paper describes an investigation into the… [The Higgs]higgs.ph.ed.ac.ukThe Higgs Centre for Theoretical PhysicsThe Haunted Frequency - Higgs Centre for Theoretical PhysicsVibrations in Tandy's chest led to br… Centre for Theoretical Physics
The Vic Tandy Example and the Resonance Hypothesis
One frequently cited case involves engineer Vic Tandy, who worked in a laboratory believed by colleagues to be haunted.
Tandy reported feelings of anxiety, discomfort and the impression of a grey shape in his peripheral vision. He later discovered a source of low-frequency vibration in the room. His subsequent investigation suggested that an infrasonic standing wave around 19 hertz might have contributed to the strange experiences. The theory proposed that low-frequency vibration affected both bodily sensations and visual perception. [Wikipedia]WikipediaSource details in endnotes. [Wind Watch Documentation]docs.wind-watch.orgWind Watch Documentation Something in the CellarWind Watch DocumentationSomething in the CellarApril 26, 2005 — by V Tandy · Cited by 85 — This paper describes an investigation into the…
Popular retellings often focus on the visual aspects of the story, but the bodily component is equally relevant. Accounts of the case describe chest vibration, breathing discomfort and a sense of dread accompanying the experience. Some discussions of the incident argue that vibration near natural resonance frequencies in parts of the body could have amplified those sensations. [The Higgs Centre for Theoretical Physics]higgs.ph.ed.ac.ukThe Higgs Centre for Theoretical PhysicsThe Haunted Frequency - Higgs Centre for Theoretical PhysicsVibrations in Tandy's chest led to br…
The Tandy case is not evidence that UFO encounters are caused by infrasound. However, it remains influential because it demonstrates how low-frequency environmental conditions can create physical sensations that people struggle to explain in the moment.
Where the Explanation Becomes Uncertain
The chest-pressure hypothesis has important limitations.
First, many UFO reports provide no acoustic measurements. Once an event is over, investigators rarely have reliable data showing whether infrasound was present, how strong it was or where it came from. The proposed mechanism is therefore often speculative.
Second, researchers continue to debate the extent of infrasound’s effects on human perception. While studies support links to discomfort, stress responses and pressure sensations, stronger claims involving dramatic hallucinations or complex visual experiences remain controversial. Some psychologists consider the evidence for effects such as vibrating eyeballs and full apparitional experiences much weaker than popular accounts suggest. [The Guardian]theguardian.comResearchers discovered that even though participants could not consciously hear infrasound, exposure led to increased irritability, eleva…
Third, chest pressure can arise from many unrelated causes. Anxiety, adrenaline surges, hyperventilation, environmental stress, vibration from vehicles, industrial noise and ordinary medical conditions can all create similar sensations. A witness describing chest heaviness during a UFO sighting does not automatically indicate an acoustic mechanism.
Finally, even when low-frequency sound is present, identifying its source can be difficult. Natural events, distant machinery, atmospheric phenomena and structural vibrations can all generate low-frequency energy. The existence of chest pressure does not reveal whether the source was mundane, unusual or connected to the reported object at all. [Wikipedia]WikipediaSource details in endnotes. [PMC]pmc.ncbi.nlm.nih.govPMCEvaluation of Low-Frequency Noise, Infrasound, and Health…by SK Chiu · 2023 · Cited by 7 — Studies have shown noise-related annoyan…
Why the Idea Remains Relevant in UFO Research
The connection between chest pressure and low-frequency sound persists because it addresses a specific feature of many reports: the sensation that something physical happened even when little conventional noise was heard.
Infrasound provides a mechanism that sits between purely psychological explanations and claims of unknown technology. It acknowledges that witnesses may genuinely experience pressure, vibration and bodily discomfort while also recognising that such sensations can sometimes arise from environmental conditions that operate below conscious hearing.
For investigators, the value of the idea is not that it solves UFO reports. Its value is that it explains how a person might feel affected by an unseen force, experience chest pressure as a real physical event, and associate that sensation with a strange object or light overhead. In cases where witnesses emphasise bodily resonance, heaviness in the chest or an almost tangible vibration in the air, low-frequency sound remains one of the most plausible known mechanisms worth considering. Sage Journals [Springer Nature Link]link.springer.comSpringer Nature LinkInfrasound, human health, and adaptation: an integrative…by MA Persinger · 2014 · Cited by 85 — Infrasound display…
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Endnotes
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Source: Wikipedia
Link: https://en.wikipedia.org/wiki/Infrasound -
Source: link.springer.com
Link: https://link.springer.com/article/10.1007/s11069-013-0827-3Source snippet
Springer Nature LinkInfrasound, human health, and adaptation: an integrative...by MA Persinger · 2014 · Cited by 85 — Infrasound display...
-
Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC10562056/Source snippet
PMCEvaluation of Low-Frequency Noise, Infrasound, and Health...by SK Chiu · 2023 · Cited by 7 — Studies have shown noise-related annoyan...
-
Source: docs.wind-watch.org
Title: Wind Watch Documentation Something in the Cellar
Link: https://docs.wind-watch.org/Something-in-the-Cellar.pdfSource snippet
Wind Watch DocumentationSomething in the CellarApril 26, 2005 — by V Tandy · Cited by 85 — This paper describes an investigation into the...
Published: April 26, 2005
-
Source: movingforwardnetwork.org
Title: Moving Forward Network Effects of Low Frequency Noise and Vibrations
Link: https://movingforwardnetwork.org/wp-content/uploads/2023/04/Waye_Noise-and-Health-Effects-of-Low-Frequency-Noise-and-Vibrations_2011.pdfSource snippet
Moving Forward NetworkEffects of Low Frequency Noise and VibrationsApril 20, 2023 — 6 Oct 2017 — A marked resonance around 60 Hz of the c...
Published: April 20, 2023
-
Source: theguardian.com
Link: https://www.theguardian.com/science/2026/apr/27/spooky-feelings-in-old-houses-may-be-caused-by-boiler-sounds-study-suggestsSource snippet
Researchers discovered that even though participants could not consciously hear infrasound, exposure led to increased irritability, eleva...
-
Source: higgs.ph.ed.ac.uk
Link: https://higgs.ph.ed.ac.uk/outreach/higgshalloween-2021/haunted-frequencySource snippet
The Higgs Centre for Theoretical PhysicsThe Haunted Frequency - Higgs Centre for Theoretical PhysicsVibrations in Tandy's chest led to br...
-
Source: theguardian.com
Link: https://www.theguardian.com/science/2003/oct/16/science.faroutSource snippet
The fear frequency | Science15 Oct 2003 — The key here is frequency: 19hz is in the range known as infrasound, below the range of human h...
Additional References
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Source: medium.com
Link: https://medium.com/%40missrennie/there-is-a-frequency-that-makes-you-see-ghosts-0c410ba07df3Source snippet
There Is a Frequency That Makes You See GhostsDocumented effects of infrasound exposure at sufficient intensity include feelings of anxie...
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Source: przyrbwn.icm.edu.pl
Link: https://przyrbwn.icm.edu.pl/APP/PDF/118/a118z1p20.pdfSource snippet
Influence of Infrasounds on the Electrocardiograph...by C Kasprzak · Cited by 12 — Research work has now established that low–frequency...
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Source: researchgate.net
Title: 400423776 Infrasound and Human Health Mechanisms Effects and Applications
Link: https://www.researchgate.net/publication/400423776_Infrasound_and_Human_Health_Mechanisms_Effects_and_ApplicationsSource snippet
(PDF) Infrasound and Human Health: Mechanisms, Effects...14 Mar 2026 — Experimental studies demonstrate that infrasound can modulate mec...
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Source: facebook.com
Title: a new study links a certain kind of sound to paranormal experiences
Link: https://www.facebook.com/PopSci/posts/a-new-study-links-a-certain-kind-of-sound-to-paranormal-experiences/1324635799538256/Source snippet
A new study links a certain kind of sound to paranormal...One of the most famous cases of infrasound-induced hauntings happened in 1998...
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Source: pmc.ncbi.nlm.nih.gov
Title: govin Vitro Controlled Experiment” by Chaban R
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC9239142/Source snippet
et al. (Noise...by F van den Berg · 2022 · Cited by 3 — Chaban et al. state that “the human body itself does not shield against infrasou...
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Source: reddit.com
Link: https://www.reddit.com/r/todayilearned/comments/ytteg/til_many_ghost_sightings_can_be_attributed_to/Source snippet
low-frequency sound that. mysteriousuniverse. TIL many UFO sightings are psychologically explained by the brain's tendency toward Pareido...
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Source: journals.lww.com
Title: a study on the contribution of body vibrations to.2.aspx
Link: https://journals.lww.com/nohe/fulltext/2011/13500/a_study_on_the_contribution_of_body_vibrations_to.2.aspxSource snippet
Lippincott JournalsA study on the contribution of body vibrations to the...by Y Takahashi · 2011 · Cited by 12 — A study on the contribut...
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Source: medium.com
Link: https://medium.com/%40luxoraxis/infrasound-vibration-and-entity-perception-how-low-frequency-sound-waves-may-trigger-reports-of-f6d17014fe39Source snippet
Infrasound, Vibration, and Entity Perception: How Low-...Infrasound around 19 hertz is notorious for producing visual disturbances...
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Source: instagram.com
Link: https://www.instagram.com/p/DYCmNlAlD2m/Source snippet
nown as being fast, so it may be that the UFO...Read more...
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Source: thetimes.com
Title: The Times Sensed a bump in the night?
Link: https://www.thetimes.com/uk/science/article/bump-in-the-night-pipes-ghosts-h3nx3h3f0Source snippet
It's not ghosts - just bad vibrationsA recent study published in *Frontiers in Behavioural Neuroscience* suggests that eerie feelings com...
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