Sweden, Orrviken · 2019-03-13 · from the WORLDHUMMAP archive
A low hum in Sweden, Orrviken
Heavy truck idling 1 km away I first heard/learned of "A global hum" 10 minutes ago !!! (what a relief, I have soon 40 years suffering alone !!! ) I am professionally as a physician, musician and personally 100% POSITIVE of external source/cause is causing/triggering "the hum" !!! (something in connection with flight guidance/control ???)
What they reported
First noticed: 1990
Pitch: 38-40 Hz (+ paralell much weaker 26Hz)
Loudest: During the night
Where: Indoors
Symptoms: Headache, Insomnia, Irritable, tired
Changes with weather: Yes, more/louder when fog, heavy snowfall or very moist.
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both described a low hum · 448 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