USA, Columbia · 2021-10-11 · from the WORLDHUMMAP archive
A low hum in USA, Columbia
It is a low-frequency humming noise that has no explanation or source. I hear it mostly at night and inside my home. The noise is similar to a train or a diesel truck engine idling and the noise is continuous...almost vibration-like. I have turned off all electrical, gas, water and other sources to my home that might be creating the noise/sound/hum and it still persists....
What they reported
First noticed: 2014
Pitch: 20 Hertz Triangle Wave
Loudest: During the night
Where: Indoors
Symptoms: Ear discomfort (pain, fullness, throbbing), Insomnia, Nausea, Sense of vibration, Anxiety, Irritability
Changes with weather: No, the sound appears to be of the same frequency and duration regardless of the weather.
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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