low frequency humming noise at night and rarely in the day, it sounds like a car engine idling outside in the street but I've looked numerous times and nothing is there I am so glad this page exists. Thought I was losing my mind. The interesting thing to note is the questions about antibiotic and soda. Those are two new things to me. I normally do not use either (unless I am sick).
What they reported
First noticed: 2018
Pitch: 120 triangle
Loudest: During the night
Where: Indoors
Symptoms: I have recently been ill with the flu and my ears were stuffed up
Changes with weather: haven't had a chance as the weather has been steadily variable (rains, overcast and some sun)
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Very low frequency rumbling, like an engine idling at a distance I put together a simple experiment: connected microphone to PC and downloaded some free spectrum analyzer software. In range …
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