The Hum

The Hum

Imagine a sound that only you can hear. A low, droning hum, like a diesel engine idling in the distance, that never stops. You hear it in your house, in your bedroom, in your head. It’s there when you wake at 2 AM, there when you try to work, there when you beg for silence that never comes. You tell others about it, but they hear nothing. They think you’re imagining it. Sometimes you wonder if you are. But the sound doesn’t stop. It has been droning since the 1970s, driving some people to madness and others to suicide, audible to only 2-4% of the population in affected areas, defying all attempts at explanation. The Hum, as it has come to be known, is one of the world’s strangest mysteries—not because it’s supernatural, but because it’s so frustratingly ordinary. A low-frequency drone, presumably caused by something mundane: industrial equipment, power lines, geological activity. Yet despite decades of investigation, despite millions of dollars in research, despite the suffering of thousands who hear it, no one has definitively identified what causes the Hum, why only some people can hear it, or how to make it stop.

The Experience

What hearers report:

A low-frequency humming or droning noise, often compared to a diesel engine idling in the distance. Sometimes described as a distant airplane that never lands or machinery running continuously. The frequency is typically between 30-80 Hz, at the edge of human hearing and too low for many people to perceive. The Hum is persistent, often continuous, and may fluctuate in intensity but rarely stops entirely. Many hearers report it’s worse at night, when other sounds quiet down, making the Hum more noticeable. Some report it’s worse indoors than outdoors, as if buildings amplify or contain it.

The Location Effect

The Hum is often location-specific. Hearers report it’s present in their home, but may diminish when they travel. Some report it following them, while others find relief by moving. The geographic pattern suggests environmental causes, but also hints at individual sensitivity.

The Inability to Block It

Earplugs don’t stop the Hum, and soundproofing doesn’t work. Moving to quiet locations doesn’t help; the Hum seems to penetrate everything, as if it’s not traveling through air but through the ground or through the hearer’s own body.

The Major Cases

Bristol, England (1970s): Hundreds of residents reported a mysterious humming beginning in the early 1970s, investigated by authorities but with no definitive source found. Some attributed it to local factories, others to underground military installations. The Bristol Hum became the first widely-known case.

Taos, New Mexico (1990s): In the early 1990s, residents of Taos began complaining of a low, persistent humming sound, which became international news and prompted congressional funding. Researchers from Los Alamos National Laboratory participated, but despite sophisticated equipment, no source was identified. The Taos Hum remains unexplained.

Windsor, Ontario (2011+): Residents along the U.S.-Canadian border began reporting a low rumble initially attributed to industrial activity on Zug Island, a heavily industrialized area across the border. Investigations found the island’s blast furnace might contribute to the sound, but the explanation remains incomplete.

Kokomo, Indiana (2001+): Residents reported a persistent drone, suggesting industrial fans at local factories. Remediation was attempted, decreasing the Hum but not eliminating it.

Auckland, New Zealand: Residents in the Auckland area have reported the Hum, demonstrating the phenomenon’s global nature. Investigations have found no definitive source; the Hum is not limited to industrial nations or to any particular climate or geology.

Who Hears It

The Statistics: Only about 2-4% of people in Hum areas can hear it. Some studies suggest even lower percentages, with the majority of people hearing nothing at all, regardless of their hearing sensitivity. The selectivity is one of the Hum’s central mysteries—why do some hear it and others don’t?

The Demographics: Middle-aged and older adults are overrepresented in those who hear the Hum, with the 40-70 age range being most common. Women may be slightly more likely to hear it than men, but the data is not conclusive. Some younger people also hear it, and there’s no perfect predictor.

The Health Effects: Chronic sleep deprivation, difficulty concentrating, irritability and anxiety, headaches and nausea, and some report physical vibrations, feeling the Hum in their bodies. Mental health deterioration over time has been reported.

The Desperation: Some sufferers have committed suicide, attributed to the relentless torment of the sound, while others have sold homes and moved, seeking relief that may or may not come. The psychological burden is immense—hearing a sound no one else hears that never, ever stops.

The Proposed Causes

Industrial Equipment: Factories produce low-frequency noise from compressors, fans, and HVAC systems. The sound can travel miles through air and especially ground. Some Hums have been traced to specific machinery, but not all.

Power Grid Resonance: Electrical infrastructure produces a 60 Hz hum (in North America) or 50 Hz hum (in Europe) from transformers, power lines, and substations. Some suggest sensitive individuals hear this or that it resonates in specific locations, creating audible or felt vibrations.

Submarine Communications: The U.S. Navy operates extremely low frequency (ELF) transmitters used to communicate with submarines, whose frequencies are close to the Hum range. Some theorize the Hum is military communication, but ELF facilities are far from most Hum locations, and the pattern doesn’t match military operations.

Geological Activity: The Earth itself produces low-frequency vibrations from tectonic stress and volcanic activity, and ocean waves creating microseisms. These are usually below human hearing, but might be perceived by sensitive individuals as a low background drone.

Tinnitus Variant: Perhaps the Hum isn’t external at all, but a form of low-frequency tinnitus generated internally in the ear or brain, explaining why only some hear it and why earplugs don’t help. It’s in their heads, literally.

Mass Psychogenic Illness: The suggestion of a Hum might create the perception—an expectation generating experience. Once people are told about the Hum, they begin listening for it and find it—real or imagined. This doesn’t mean sufferers are lying, just that perception is complicated.

The Investigations

The Taos Study (1993): Conducted in response to congressional concern, researchers from multiple institutions participated, measuring acoustic and electromagnetic signals, interviewing hearers, and creating maps of where the Hum was strongest. They found nothing definitive.

The Findings: Some hearers could identify the Hum in blind tests, indicating they genuinely heard something, but no external source matched their perception. The Hum wasn’t recorded by microphones or correlated with any measured signal—either the source was undetectable by instruments or the sound was internally generated.

The Frustration: The Hum is intermittent and location-specific, and by the time researchers arrive, conditions may change. The sound is at the edge of detectability, and standard audio equipment may not capture it. Hearers’ descriptions vary, making it hard to know what to look for. The phenomenon resists systematic study.

Partial Successes: In Kokomo, industrial fans were identified; in Windsor, Zug Island operations were implicated; and in some locations, specific machinery correlates. Remediation has sometimes helped, but the Hum rarely disappears completely, suggesting multiple causes or that the identified source was only part of the problem.

The World Hum Project

The Database: Dr. Glen MacPherson created the World Hum Map and Database, collecting reports from around the world, documenting thousands of locations where people experience the Hum. The data shows global distribution, with no continent exempt—the Hum is worldwide.

The Patterns: Hum reports cluster in certain areas, but also appear in isolation. Urban and rural areas both produce reports, and industrial zones and wilderness alike. The pattern doesn’t clearly match any single cause, but the data continues to accumulate.

The Research: MacPherson and others continue to study the phenomenon, testing equipment, interviewing sufferers, and attempting to identify common factors. The research is largely unfunded and conducted by dedicated individuals who believe the Hum deserves explanation.

The Sufferers’ Lives

The Daily Experience: The Hum is there when you wake, there when you try to sleep, there in quiet moments, there in noise—always humming, always droning. You can sometimes distract yourself with music, television, or activity, but silence brings the Hum rushing back.

The Isolation: You tell friends and family about the sound, but they don’t hear it, they look at you strangely, they wonder if something is wrong with you, and you wonder too. The gaslighting effect is profound—are you crazy, or is the Hum real?

The Search for Relief: What people try is often futile—earplugs, white noise machines, moving to new locations, sleeping pills, anxiety medication, visiting doctors who find nothing wrong, joining online support groups, and trying anything that might help—usually finding nothing that does.

The Support Networks: Finding others who hear it provides comfort—online forums connect Hum hearers, allowing people to share experiences, strategies, and the discovery that you’re not alone. Others hear it too, and others are suffering too—the validation matters even if the Hum doesn’t stop.

The Mystery Endures

Why Only Some Hear It: What makes 2-4% sensitive to the Hum? Is it physical—something about their ears? Is it neurological—something about their brains? Is it environmental—something about their locations? No factor clearly predicts who will hear it, and who will hear only silence.

What Causes It: Is there one Hum or many? Different sources in different locations? A single phenomenon or coincidental clustering? Despite decades of investigation, no definitive answer exists.

How to Stop It: If we understood the cause, perhaps we could engineer solutions—soundproofing, remediation, medical treatment—but without understanding, we can offer sufferers little except sympathy and the promise of continued research.

The Drone That Won’t Stop

Somewhere in Taos, someone is hearing a sound that won’t stop. In Bristol, in Auckland, in Windsor, in a hundred places around the world, people are lying awake at 3 AM, listening to a low drone that no one else can hear, wondering if they’re going crazy, wondering why no one believes them, wondering if it will ever, ever stop.

Sources

• Wikipedia search: “The Hum”