AnomalyLow pitch, like a train engine idling on the tracks I thought I caused this when I remodeled my basement. Build walls with an air gap of 6 inches from the original walls to the new walls. Thought sound was getting trapped and echoing. But that can't be it because I hear it almost everywhere now. I thought the source might be a solitary wind power generator which is right next to two cell towers. Figured the cell towers might be sending sound into the 300' windmill tower and resonating from there? Also thought it might be combined sounds from three sources which all intersect at my neighborhood/house.
USA, Illinois · 2019-10-31 · from the WORLDHUMMAP archive
An account in USA, Illinois
What they reported
First noticed: 2017
Pitch: 65 HZ
Loudest: Equal night and day
Where: Indoors
Symptoms: Headache, Insomnia, Inability to concentrate
Changes with weather: No
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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.