AnomalyA diesel truck warming up during a cold morning. The sound isn’t steady; it’s like the engine needs a tune up. Our town has attracted industrial plants (Dow Chemical, Fabri-Kal, Pacific Ethanol) to sites that are within a few miles of my home. The plants have been there for three of four years. Just before this sound started (that only I can hear/feel) my husband and I both could hear a loud, higher pitched drone several times during the day and night. That has largely stopped.
United States, Burley · 2020-01-29 · from the WORLDHUMMAP archive
An account in United States, Burley
What they reported
First noticed: 2019
Pitch: 23 HZ (triangle, if that matters) this was hard to match exactly.
Loudest: During the night
Where: Indoors
Symptoms: Ear discomfort (pain, fullness, throbbing), Insomnia, Sense of vibration
Changes with weather: Not sure. Started in Fall of 2019.
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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.