Denmark, Knudby · 2018-08-31 · from the WORLDHUMMAP archive
A low hum in Denmark, Knudby
generator-like plus overtones First of all, thank You for being out there. Wikipedia "Hum" lead me here, and I can't believe I missed that out. Original personal description at my google+ profile. Here's a catch-phrase "Constant electro-mechanic ambient noise". Just wondering, should the smartmeter issue not be mentioned?
What they reported
First noticed: 2011
Loudest: During the night
Where: Indoors
Symptoms: Insomnia;Anxiety;first couple of years: engagement, talking with neighbours, byuing soundrecorder, making recordings. Not easy, or determinative.
Changes with weather: Wind will disquise the sound, sometimes
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both described a low hum · 390 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