AnomalyLike 2 generators that are slightly out of phase behind a baffle... Or like an engine far away I heard the noise when I moved to Jacksonville Florida. It seems location dependent, but I had spent months in Jacksonville previously, and I never heard it until 2 days after moving here. Now I hear it in parking lots and locations miles away from my house. -WTF?!
USA Florida Jacksonville 32244 · 2020-02-24 · from the WORLDHUMMAP archive
An account in USA Florida Jacksonville 32244
What they reported
First noticed: 2020
Pitch: 54hz ..hard to tell, but somewhere around there sounds right
Loudest: During the night
Where: Indoors
Symptoms: Ear discomfort (pain, fullness, throbbing), Headache
Changes with weather: Not sure.
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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.