United States, Lake City · 2019-06-17 · from the WORLDHUMMAP archive
A low hum in United States, Lake City
Sounds as if a 4 to 6 cylinder diesel engine running in the distance. I disconnected my electrical power to the home once to test if the Hum is being generated by the power grid. It made no difference; the Hum was just as prevalent and loud to me. My wife barely hears it. Also, I live in a sparsely populated forested area with little to no traffic, no railroads, airports, subways. My home is a single wide trailer supported on piers seemingly acting as an amplifier for vibration. The same with my truck supported on heavy old suspension and 80 psi tires. I never hear it outside in the atmosphere.
What they reported
First noticed: 2016
Pitch: 70 Hz on the sine wave, exactly.
Loudest: Equal night and day
Where: Indoors
Changes with weather: Not that I have been able to discern.
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the accounts read alike, found by meaning rather than by shared details
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This is a Hum report from Dr Glen MacPherson's World Hum Map, an open, worldwide record of people who hear an unexplained low-frequency hum. Reproduced with permission and with thanks; the project is at thehum.info. We remove anything on request. Location shown is approximate.
Anomaly