2066 Sydney suburb, NSW Australia · 2019-03-18 · from the WORLDHUMMAP archive
A low hum in 2066 Sydney suburb, NSW Australia
Low frequency hum about 35-40Hz. Sounds mechanical like an industrial air conditioner. Mostly soft monotone but sometimes loud reciprocating like a pump or motor. I have turned off all electricity to my house and checked all air conditioners around and near my house. I have even heard it during a electrical blackout in my suburb.
What they reported
First noticed: 2018
Pitch: 35-40Hz Sine
Loudest: During the night
Where: Indoors
Symptoms: Sense of vibration, Anxiety
Changes with weather: Mostly soft monotone but sometimes loud reciprocating like a pump or motor generally after unusual environmental events like heavy rain or extreme temperature.
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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