USA, Mayflower · 2018-01-29 · from the WORLDHUMMAP archive
A low hum in USA, Mayflower
Like a plane flying over but never pitching closer or further away. There are two tones that intermittently but constantly pulse. Sometimes the pulses are strong enough to make a muffled pop like you might hear while swimming underwater. The hum is louder in rooms closest to the outer wall which is built with stone.
What they reported
First noticed: 2017
Pitch: The lower tone is close to 100hz but I couldn�t really match up the higher one. My closest would be 435hz for the higher time which is more consistent than the lower.
Loudest: During the night
Where: Indoors
Symptoms: Doesn�t bother me. After I looked it up I am now intrigued and feel priveledged to be one of the few who can hear it.
Changes with weather: Yes, when there is enough to raise the ambient noise louder than the hum.
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both described a low hum
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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