United States, Catawba · 2019-03-19 · from the WORLDHUMMAP archive
A low hum in United States, Catawba
It sounded kind of like a diesel engine. It had a throbbing quality. It was louded indoors. I could hear it outside but it was less intense. When I tried to locate the hum, I went outside. It became less noticeable outside. There was a large industrial plant approximately 1 mile away. The hum did not seem to originate from there. This was a very rural setting and there was no other potential sources in the vicinity.
What they reported
First noticed: 1992
Pitch: 50 Hz. Sine wave. BUT it throbbed like a large motor/engine running under partial load.
Loudest: During the night
Where: Indoors
Symptoms: None.
Changes with weather: I no longer live in the house where I experienced the hum but that was in a stand lone house in a very rural setting. I never noticed a change that coincided with weather changes.
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both described a low hum · 106 km away
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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