FILE DEPT

Field Report Archive

Private Skeptical Evidence Corpus

Case Files Map Source Manifest

← Back to Case Files

Fortean/Historical AnomalyAtmospheric/Astronomical Scientific Analysis
Evidence Dossier

Legacy category: Sensory and Acoustic Anomaly

Taos Hum: Multi-Agency Technical and Demographic Investigation

Evidence Dossier: A record proves that a statement, transfer, examination, or result was documented. It does not automatically prove the anomalous interpretation attached to it.
OverviewEvidenceTimelineAnalysisSources
1993, 1995, 2016
Taos, New Mexico, Tres Piedras, New Mexico
8/10
6/10
A persistent low-frequency hum was reported by a subset of residents in Taos in 1993, but scientific investigations found no matching external physical signals, leaving the cause unresolved.
Strong primary field report and published Acoustical Society of America summary, supplemented by physiological review, with major limits because no objective signal was isolated in the environment.

Investigative Assessments

"The reported claim remains worth testing against the record: A persistent low-frequency hum was reported by a subset of residents in Taos in 1993, but scientific investigations found no matching external physical signals, leaving the cause unresolved. The strongest documented reasons to keep the file open are: Taos Hum Investigation: Informal Report: Documents the field measurements, the 11.2% respondent rate, and the lack of external acoustic signals; New Mexico MUFON News Issue No. 5: Documents early 1992 measurements of a 17 to 70 Hz wavering tone by engineer Dana Hougland. Key unresolved lead: Why the hum is perceived in remote locations like Tres Piedras with no electric utility lines."
"Evidentiary limitations: Strong primary field report and published Acoustical Society of America summary, supplemented by physiological review, with major limits because no objective signal was isolated in the environment. Note that: Taos Hum Investigation: Informal Report fails to support: Does not prove a physical external source for the sound; New Mexico MUFON News Issue No. 5 fails to support: Does not contain peer-reviewed scientific analysis. Documented contradiction: Hearers reported an abrupt beginning and steady sound, yet high-sensitivity acoustic sensors recorded only normal background noise. Leading conventional hypothesis: Low-frequency tinnitus or internal ear canal resonance"

Case Summary

In 1993, at the request of the New Mexico congressional delegation, a team of scientists from the University of New Mexico, Sandia National Laboratories, Los Alamos National Laboratory, and the Phillips Air Force Laboratory conducted a field investigation into a persistent low-frequency hum reported by local residents. Acoustic, seismic, and electromagnetic measurements did not detect any anomalous external signals explaining the noise. Demographic surveys estimated that approximately 2% of the local population heard the hum. Later research evaluated physiological explanations, including low-frequency tinnitus and inner ear resonances.

Evidence Locker

3 inspectable evidence items. Claims and source findings are kept separate.

Technical field report transcript Local copy hash-verified Complete source

Taos Hum Investigation: Informal Report

Analyst rating: The primary official summary of the multi-agency field investigation

“The investigation Congress requested consisted of a team of a dozen investigators from a number of scientific institutions. Joe Mullins of the University of New Mexico and Horace Poteet of Sandia National Laboratories wrote the team's final report.”
Record locationComplete HTML transcript
Evidence classgovernment report
Relationship to claimDefinitive technical report showing the results of the 1993 field study.
Authenticity assessmentVerified text matches official summaries of the Mullins-Poteet report.
What this supportsDocuments the field measurements, the 11.2% respondent rate, and the lack of external acoustic signals.
What it does not supportDoes not prove a physical external source for the sound.
ProvenanceMullins and Poteet's 1993 report, transcribed and hosted in the QSL.net radio archives.
Chain of custodyTranscribed from original report copies, hosted on amateur radio servers, and retrieved via HTTP GET.
Source completenessComplete. Full transcript of the informal report text is preserved.
Known gaps: No known completeness gaps recorded.
Open Complete Source (Local HTML Media) Download Copy Canonical Agency Record
Contemporaneous regional newsletter Local copy hash-verified Complete source

New Mexico MUFON News Issue No. 5

Analyst rating: Local chronicle documenting the state of reports prior to the study

“A Denver acoustical engineer, Dana Hougland, was hired by some of the residents to try and find the hum. She found a low-frequency hum between 17 and 70 cycles per second.”
Record locationIssue No. 5, May 1993
Evidence classhistorical newspaper investigation
Relationship to claimContemporaneous documentation of resident experiences and initial acoustic attempts.
Authenticity assessmentAuthentic regional organization newsletter.
What this supportsDocuments early 1992 measurements of a 17 to 70 Hz wavering tone by engineer Dana Hougland.
What it does not supportDoes not contain peer-reviewed scientific analysis.
ProvenanceDigitized from the MUFON chapter newsletter collection in the Internet Archive.
Chain of custodyAcquired from the Internet Archive digital collection and stored locally.
Source completenessComplete. Full text of the newsletter issue is preserved.
Known gaps: No known completeness gaps recorded.
Open Complete Source (Local TXT Document) Download Copy Canonical Agency Record
Peer-reviewed scientific review article Local copy hash-verified Complete source

Manifestations of a low-frequency sound of unknown origin perceived worldwide, also known as the Hum or the Taos Hum

Analyst rating: Physiological and neurological analysis of the hum phenomenon

“The Hum is a low-frequency sound of unknown origin. It is proposed that the Hum is a form of low-frequency tinnitus originating in the semicircular canals.”
Record locationPages 11 to 19
Evidence classscientific analysis
Relationship to claimEvaluates the physiological hypothesis for the hum.
Authenticity assessmentPublished peer-reviewed journal article.
What this supportsEvaluates low-frequency hearing thresholds and proposes inner ear vestibular resonance as a mechanism.
What it does not supportDoes not provide localized field measurements in Taos.
ProvenancePublished in the International Tinnitus Journal (Volume 20, 2016).
Chain of custodyDownloaded directly from the publisher's open-access repository.
Source completenessComplete. Complete scientific paper is preserved.
Known gaps: No known completeness gaps recorded.
Open Complete Source (Local PDF Document) Download Copy Canonical Agency Record

Documented Timeline

  • April 1993: New Mexico congressional delegation requests a formal scientific investigation into the Taos Hum.
  • May 1993: The multi-agency scientific team conducts a week-long field study in Taos.
  • August 23, 1993: Investigators release the Taos Hum Investigation: Informal Report.
  • Autumn 1995: Investigators publish a scholarly summary of the findings in Echoes.

Named Participants and Roles

  • Taos Hum Hearers Aggregate, Local residents who reported hearing the low-frequency hum. Account basis: Anonymous. Witness quality: Moderate. Surveys documented consistent descriptions of the sound as similar to a distant diesel engine, but individual perception varied and no physical signal was measured in their presence. Evidence: taos_informal_report, taos_mufon_newsletter

Contradictions and Record Conflicts

  • Hearers reported an abrupt beginning and steady sound, yet high-sensitivity acoustic sensors recorded only normal background noise.
  • Many suspected military ELF signals, but electromagnetic monitoring detected no matching transmissions.

Conventional Explanations

  • Low-frequency tinnitus or internal ear canal resonance
    Evidence for: The absence of any measurable external acoustic wave or seismic vibration in the local environment points to an internal origin.
    Limits: Standard tinnitus typically presents at much higher frequencies than the 30 to 80 Hz range matched by hum hearers.
    Evidence: taos_informal_report, taos_tinnitus_journal

Evidence Stance Matrix

HypothesisStanceRationaleEvidence IDs
The hum is caused by localized low-frequency electromagnetic fields from power lines or transmitters.MixedPower line harmonics are present, but the hum is heard in remote areas far from the electric grid.taos_informal_report, taos_mufon_newsletter
The hum is a biological or physiological phenomenon, such as low-frequency tinnitus or spontaneous otoacoustic emissions.SupportsInner ear resonant structures could explain why external microphones fail to capture the sound.taos_informal_report, taos_tinnitus_journal
The hum is an acoustic signal from a distant, unidentified industrial or military source.ChallengesSensitive acoustic arrays failed to isolate any directional or ambient low-frequency sound wave corresponding to the hum.taos_informal_report

Missing Evidence

  • Continuous local acoustic and electromagnetic datasets during an active hum event
    Would help determine if transient industrial or atmospheric signals correlate with the reports.

What Remains Unresolved

  • The source of the low-frequency noise perceived by hearers
    Field measurements failed to isolate any corresponding acoustic or electromagnetic energy in the environment.

Investigative Hypotheses

  • The hum is caused by localized low-frequency electromagnetic fields from power lines or transmitters.
  • The hum is a biological or physiological phenomenon, such as low-frequency tinnitus or spontaneous otoacoustic emissions.
  • The hum is an acoustic signal from a distant, unidentified industrial or military source.

Open Questions

  • Why the hum is perceived in remote locations like Tres Piedras with no electric utility lines.
  • The lack of correlation between instrument measurements and the subjective timing of the hum.
  • Why only a small percentage of the population can perceive the sound.

Archival Landing Pages and Evidence Corpus

Taos Hum Investigation: Informal Report

Government Report Local Source Verified

External URL: http://www.qsl.net/w5www/taoshum.html

Open Local Artifact (HTML Document) · Download Copy

New Mexico MUFON News Issue No. 5

Historical Newspaper Investigation Local Source Verified

External URL: https://archive.org/download/NM_MUFON_News_no_05_1993_05/NM_MUFON_News_no_05_1993_05_djvu.txt

Open Local Artifact (TXT Document) · Download Copy

Manifestations of a low-frequency sound of unknown origin perceived worldwide, also known as the Hum or the Taos Hum

Scientific Analysis Local Source Verified

External URL: https://www.tinnitusjournal.com/articles/manifestations-of-a-lowfrequency-sound-of-unknown-origin-perceived-worldwide-also-known-as-the-hum-or-the-taos-hum.pdf

Open Local Artifact (PDF Document) · Download Copy