Within Buzzing
Can Electromagnetic Fields Make Buzzing Sounds?
The microwave auditory effect is real science, but applying it to UFO buzzing claims usually outruns the evidence available in case reports.
On this page
- What the microwave auditory effect actually means
- Why UFO applications are usually speculative
- What evidence would make the claim testable
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Introduction
Some UFO witnesses describe a buzzing, humming or crackling sound that feels unusually intimate. Instead of seeming to come from a visible object in the sky, the noise is sometimes reported as if it were inside the head, surrounding the listener, or impossible to locate. Because of those descriptions, some writers have suggested a connection to the microwave auditory effect, also known as the Frey effect.
The microwave auditory effect is a real and documented phenomenon. Under specific laboratory and engineering conditions, pulsed microwave energy can produce perceived sounds without ordinary airborne sound waves reaching the ear. However, moving from that established scientific effect to claims about UFO buzzing encounters is a much larger step. The central problem is not whether microwave hearing exists. It does. The problem is that most UFO reports do not contain the measurements needed to show that the effect was actually involved. [PMC]pmc.ncbi.nlm.nih.govPMCCan the Microwave Auditory Effect Be “Weaponized”?PMCby KR Foster · 2021 · Cited by 20 — Brief but intense pulses of radiofrequency (RF) energy can elicit auditory sensations when absorbe… [PubMed]pubmed.ncbi.nlm.nih.govThe weight of evidence of the results…Read more…
What the microwave auditory effect actually means
The microwave auditory effect was investigated extensively after reports from people working near radar equipment during and after the Second World War. Research by Allan H. Frey and later investigators showed that brief pulses of radiofrequency energy can create perceived sounds without a conventional acoustic source. Witnesses in experiments commonly described clicks, chirps, knocks, hisses or buzzing sensations. [Wikipedia]WikipediaMicrowave auditory effectMarch 10, 2026 — The microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of the human perc… [American Chemical Society Publications]pubs.acs.orgAmerican Chemical Society Publications The Microwave Hearing EffectAmerican Chemical Society PublicationsThe Microwave Hearing Effect - ACS PublicationsAug 4, 1981 — Human subjects exposed to pulse-modula…
The important detail is that the sound is not transmitted through the air like an ordinary engine noise. The leading explanation is thermoelastic expansion. Extremely brief microwave pulses deposit small amounts of energy into tissue, producing tiny pressure waves inside the head that are then interpreted by the auditory system as sound. Modern reviews continue to identify this mechanism as the best-supported explanation. [PubMed]pubmed.ncbi.nlm.nih.govThe weight of evidence of the results…Read more… [science]science.orgScienceMicrowave Hearing: Evidence for Thermoacoustic Auditory…Acoustic transients can be thermally generated in water by pulsed micro… Several features of the effect are relevant to UFO buzzing claims:
- The perceived sound can seem to originate inside or near the head rather than from a clear external direction. [American Chemical Society Publications]pubs.acs.orgAmerican Chemical Society Publications The Microwave Hearing EffectAmerican Chemical Society PublicationsThe Microwave Hearing Effect - ACS PublicationsAug 4, 1981 — Human subjects exposed to pulse-modula…
- Different pulse patterns can produce different sensations, including clicks, chirps and buzzing tones. [ADS]ui.adsabs.harvard.eduThis paper reviews the research in humans and animals leading to scientific documentations that…Read more…
- Nearby observers may not hear the same thing if they are not exposed in the same way. [Bionity]bionity.comBionityMicrowave auditory effectThe microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of…
- The phenomenon depends on pulsed energy characteristics rather than simply high average power. [PubMed]pubmed.ncbi.nlm.nih.govThe weight of evidence of the results…Read more…
These characteristics explain why the idea attracts attention in discussions of unusual auditory experiences. A witness who reports a buzzing sensation with no obvious sound source is describing something that superficially resembles known properties of microwave hearing.
Why UFO applications are usually speculative
The existence of a real mechanism does not automatically validate its use in UFO explanations.
Most UFO case reports provide descriptions rather than measurements. Witnesses may report hearing a hum, feeling pressure in the ears, sensing vibration in the body, or perceiving a sound that seemed to come from nowhere. Those details can be interesting, but they are not enough to identify microwave exposure. Similar descriptions can arise from many ordinary causes, including distant machinery, electrical infrastructure, low-frequency sound, stress reactions, expectation effects, tinnitus, and difficulties in sound localisation. [PubMed]pubmed.ncbi.nlm.nih.govThe weight of evidence of the results…Read more…
Another problem is that many classic UFO buzzing accounts describe sounds heard by multiple people simultaneously at significant distances from an object. The microwave auditory effect is not a broad environmental sound field in the ordinary sense. It is an individual percept produced within the exposed person’s auditory system. If a report involves a large group independently hearing the same external buzzing source, that pattern does not automatically fit the Frey effect model. [American Chemical Society Publications]pubs.acs.orgAmerican Chemical Society Publications The Microwave Hearing EffectAmerican Chemical Society PublicationsThe Microwave Hearing Effect - ACS PublicationsAug 4, 1981 — Human subjects exposed to pulse-modula…
The engineering requirements also matter. Scientific reviews note that producing microwave auditory sensations requires pulsed radiofrequency systems with specific exposure characteristics. While such systems exist, demonstrating that an unknown aerial object was generating them is a separate claim requiring evidence beyond witness impressions. [PMC]pmc.ncbi.nlm.nih.govPMCCan the Microwave Auditory Effect Be “Weaponized”?PMCby KR Foster · 2021 · Cited by 20 — Brief but intense pulses of radiofrequency (RF) energy can elicit auditory sensations when absorbe…
This distinction is often lost in UFO literature. A report may begin with a witness describing a strange buzz and end with speculation about electromagnetic propulsion, directed energy or advanced technology. Yet the chain of evidence linking those ideas is usually missing. The report establishes only that a person heard or felt something unusual.
Why the idea became popular in UFO discussions
The microwave auditory effect occupies an unusual place between established science and speculative interpretation.
Unlike many proposed UFO mechanisms, microwave hearing is not hypothetical. Peer-reviewed studies have documented it for decades. That gives the concept a credibility that purely fictional explanations lack. Researchers have repeatedly shown that radiofrequency pulses can create auditory sensations under controlled conditions. [PubMed]pubmed.ncbi.nlm.nih.govThe weight of evidence of the results…Read more… [ADS]ui.adsabs.harvard.eduThis paper reviews the research in humans and animals leading to scientific documentations that…Read more…
At the same time, the effect appears counterintuitive. The idea that a person can hear a sound without a conventional sound wave feels strange enough to resemble descriptions found in close-encounter narratives. UFO authors therefore sometimes use the Frey effect as a bridge between witness testimony and electromagnetic interpretations.
Interest increased further during debates over alleged directed-energy incidents and so-called Havana Syndrome. Some discussions proposed microwave auditory mechanisms as one possible explanation for reported buzzing, clicking or pressure sensations. However, even in that much more specific context, the scientific and intelligence communities have not reached a universal conclusion about causation. The debate itself illustrates how difficult it is to infer a microwave source from subjective auditory reports alone. [National Academies]nationalacademies.orgNational AcademiesAdditional Comments on Directed Radio Frequency EnergyThe average power densities associated with some of these effects… [PMC]pmc.ncbi.nlm.nih.govPMCCan the Microwave Auditory Effect Be “Weaponized”?PMCby KR Foster · 2021 · Cited by 20 — Brief but intense pulses of radiofrequency (RF) energy can elicit auditory sensations when absorbe…
The strongest and weakest UFO-style indicators
Certain witness details are more compatible with microwave-hearing hypotheses than others, although none are decisive on their own.
More suggestive features include:
- A sound perceived as internal rather than external.
- Difficulty determining the direction of the sound.
- Sudden onset and disappearance without a clear acoustic source.
- Reports from only one exposed individual while nearby people hear nothing.
- Simultaneous sensations of pressure, clicking or unusual auditory distortion. [American Chemical Society Publications]pubs.acs.orgAmerican Chemical Society Publications The Microwave Hearing EffectAmerican Chemical Society PublicationsThe Microwave Hearing Effect - ACS PublicationsAug 4, 1981 — Human subjects exposed to pulse-modula… PubMed Less suggestive features include: [pubmed.ncbi.nlm.nih.gov]pubmed.ncbi.nlm.nih.govThe weight of evidence of the results…Read more…
- A conventional buzzing noise clearly heard by multiple observers.
- Sounds that behave like ordinary environmental acoustics.
- Audible noise recorded on microphones or video recordings.
- Reports lacking any indication of unusual auditory perception beyond a generic hum.
The reason is simple: the microwave auditory effect is fundamentally different from an airborne sound source. Evidence that points toward ordinary acoustics weakens the need for a microwave explanation.
What evidence would make the claim testable
Most UFO buzzing reports remain anecdotal because they lack the data needed to distinguish between competing explanations.
A genuinely testable case would require much more than witness testimony. Useful evidence would include:
- Simultaneous radiofrequency measurements from the location.
- Precise timing of the reported auditory event.
- Independent witness comparisons documenting who heard the sound and who did not.
- Environmental recordings showing whether conventional acoustic sound was present.
- Medical or physiological data collected immediately after exposure.
- Repeated observations under similar conditions rather than a single retrospective account.
The key question would be whether a measurable pulsed electromagnetic source was present at the same time the auditory sensation occurred. Without that information, investigators cannot determine whether a reported buzz was caused by microwave hearing, ordinary sound, a physiological effect, or a perceptual misinterpretation.
What the evidence currently supports
The microwave auditory effect is one of the rare cases where a seemingly science-fiction concept has substantial experimental support. Humans can perceive clicks, chirps and buzzing sensations generated by pulsed microwave exposure under certain conditions. That part is well established. [PubMed]pubmed.ncbi.nlm.nih.govThe weight of evidence of the results…Read more… [ADS]ui.adsabs.harvard.eduThis paper reviews the research in humans and animals leading to scientific documentations that…Read more…
What remains unestablished is the leap from laboratory demonstrations to UFO buzzing encounters. Most case reports contain descriptions that are too general, incomplete or retrospective to identify the mechanism involved. A witness saying that a UFO produced an electrical hum or that a buzzing sensation felt internal does not provide evidence that microwaves caused the experience.
As a result, the microwave auditory effect occupies an unusual position in UFO sound discussions. It is scientifically real enough to prevent outright dismissal, yet the available UFO evidence is usually too weak to show that the phenomenon actually occurred in the reported event. The mechanism exists; the case-specific proof generally does not. [PMC]pmc.ncbi.nlm.nih.govPMCCan the Microwave Auditory Effect Be “Weaponized”?PMCby KR Foster · 2021 · Cited by 20 — Brief but intense pulses of radiofrequency (RF) energy can elicit auditory sensations when absorbe… [PubMed]pubmed.ncbi.nlm.nih.govThe weight of evidence of the results…Read more…
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Endnotes
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Source: pmc.ncbi.nlm.nih.gov
Title: PMCCan the Microwave Auditory Effect Be “Weaponized”?
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC8733248/Source snippet
PMCby KR Foster · 2021 · Cited by 20 — Brief but intense pulses of radiofrequency (RF) energy can elicit auditory sensations when absorbe...
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Source: ui.adsabs.harvard.edu
Link: https://ui.adsabs.harvard.edu/abs/2022IJERM…6…16L/abstractSource snippet
This paper reviews the research in humans and animals leading to scientific documentations that...Read more...
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Source: Wikipedia
Title: Microwave auditory effect
Link: https://en.wikipedia.org/wiki/Microwave_auditory_effectSource snippet
March 10, 2026 — The microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of the human perc...
Published: March 10, 2026
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Source: bionity.com
Link: https://www.bionity.com/en/encyclopedia/Microwave_auditory_effect.htmlSource snippet
BionityMicrowave auditory effectThe microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of...
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Source: frey.com
Link: https://frey.com/?srsltid=AfmBOops4x0a2Afa88gpDEbd8I3xceJrHNvOUsxm85-ZOo1NbETUdUsRSource snippet
Frey - Clean, Fresh & Eco-Friendly Laundry Care – FREYAt Frey, we believe in creating luxury laundry products that clean amazing, smell i...
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Source: pubmed.ncbi.nlm.nih.gov
Link: https://pubmed.ncbi.nlm.nih.gov/14628312/Source snippet
The weight of evidence of the results...Read more...
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Source: pubs.acs.org
Title: American Chemical Society Publications The Microwave Hearing Effect
Link: https://pubs.acs.org/doi/10.1021/bk-1981-0157.ch018Source snippet
American Chemical Society PublicationsThe Microwave Hearing Effect - ACS PublicationsAug 4, 1981 — Human subjects exposed to pulse-modula...
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Source: science.org
Link: https://www.science.org/doi/10.1126/science.185.4147.256Source snippet
ScienceMicrowave Hearing: Evidence for Thermoacoustic Auditory...Acoustic transients can be thermally generated in water by pulsed micro...
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Source: nationalacademies.org
Link: https://www.nationalacademies.org/read/25889/chapter/11Source snippet
National AcademiesAdditional Comments on Directed Radio Frequency EnergyThe average power densities associated with some of these effects...
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Source: sciencedirect.com
Link: https://www.sciencedirect.com/science/article/abs/pii/0006899377907351Source snippet
et al. Human perception of illumination with pulsed ultrahigh-frequency electromagnetic energy... The Microwave Auditory Effect. 2022, I...
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Source: youtube.com
Link: https://www.youtube.com/watch?v=8wear2gf2FkSource snippet
ite House grounds. 60 Minutes...
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Source: ycombinator.com
Link: https://www.ycombinator.com/companies/freySource snippet
is a line of exceptional laundry and clothing care...FREY is a line premium clothing care products meticulously designed to smell better...
Additional References
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Source: researchgate.net
Link: https://www.researchgate.net/publication/363461470_The_Microwave_Auditory_EffectSource snippet
(PDF) The Microwave Auditory EffectThis paper reviews the research in humans and animals leading to scientific documentations that absorp...
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Source: instagram.com
Link: https://www.instagram.com/reel/C0hIJKxg6Go/?hl=enSource snippet
DAY 107CONSPIRACY THEORY: The Microwave Auditory...And that's happening right now. UFOs and Star Wars stuff. Check it out. OCR. UFO's in...
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Source: merriam-webster.com
Link: https://www.merriam-webster.com/dictionary/FreySource snippet
FREY Definition & Meaningnoun ˈfrā: the Norse god of fertility, crops, peace, and prosperity. Word History Etymology Old Norse Freyr Fir...
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Source: chemeurope.com
Link: https://www.chemeurope.com/en/encyclopedia/Microwave_auditory_effect.htmlSource snippet
Microwave auditory effectThe microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of audibl...
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Source: academia.edu
Link: https://www.academia.edu/165021818/The_Microwave_Auditory_Effect_Radar_Research_RF_Bioeffects_and_Havana_Syndrome_A_Comprehensive_Historical_and_Technical_Analysis_1940s_2026Source snippet
(PDF) The Microwave Auditory Effect, Radar Research, RF...23 Mar 2026 — This book presents a comprehensive historical and technical exam...
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Source: amazon.com
Title: Frey Laundry Care FREY Laundry Detergent + Dryer Sheets Bundle, 60 Count
Link: https://www.amazon.com/stores/FreyLaundryCare/page/0737CAE5-5426-4247-9BE2-C0EEFEDA317ESource snippet
Frey Laundry CareFREY Laundry Detergent + Dryer Sheets Bundle, 60 Count - Plastic Free Liquidless Full Wash Solution for Soft, Fresh Clot...
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Source: youtube.com
Link: https://www.youtube.com/watch?v=FNpBd_f_p9gSource snippet
"WikiPedia: [https://en.wikipedia.org/wiki/Microwave_auditory_effect?fbclid=IwY2xjawJHj2pleHRuA2FlbQIxMAABHcirsTSIXDrRtRx3jHLTiIFWM3LuZVEop..."](https://en.wikipedia.org/wiki/Microwave_auditory_effect?fbclid=IwY2xjawJHj2pleHRuA2FlbQIxMAA...
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Source: facebook.com
Link: https://www.facebook.com/ScienceNaturePage/posts/scientists-spent-17-years-chasing-mysterious-signals-from-space-turns-out-they-c/1222874129293454/Source snippet
Turns out, they came from... a microwave oven. For nearly two decades, astronomers...
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Source: reddit.com
Link: https://www.reddit.com/r/ObscurePatentDangers/comments/1mwmlb4/the_microwave_auditory_effect_frey_effect_voices/Source snippet
c sounds or even words directly into a person's head without anyone...Read more...
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Source: reddit.com
Link: https://www.reddit.com/r/amateurradio/comments/10ktduv/diagram_for_pulse_modulating_the_microwave/Source snippet
udible clicks, or even speech, induced by pulsed or modulated...Read more...
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