US, Arnoldsville · 2019-04-03 · from the WORLDHUMMAP archive
A low frequency rumbling, similar to a dispel engine. I've noticed the sound is remarkably similar to that of general frequencies of Earth recorded from satellites. https://www.youtube.com/watch?v=5AVHXMLDvWA I don't see how there could be much of a correlation, of course, seeing as how these noises are converted radio wave frequencies. Regardless, I thought it was interesting.
What they reported
First noticed: 2016
Pitch: 45 Hz
Loudest: During the night
Where: Indoors
Symptoms: Sense of vibration, Irritation
Changes with weather: I haven't observed this.
What stood out: a low humrumbling
An endless, distant low rumbling like the sound of a truck engine, but much quieter. It├»┬┐┬╜s not terrifyingly loud but I can├»┬┐┬╜t help but notice it. When I├»┬┐┬╜m focused on something, …
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both described a low hum · rumbling · 423 km away
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both described a low hum · rumbling · 857 km away
Continuous Low Frequency hum... maybe 120 hz, sometimes accompanied by a very low frequency, slow rumble ~30 hz. Was near a dynamite explosion once... also directly under a 3" artillery piec…
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Low pitch humming like a distant drone, constant low bass humming. At first I thought it was a distant engine, or electric transformer, or factory sounds in the distance... but I have ruled…
both described a low hum · rumbling · on the other side of the country
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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