Germany, Frielendorf · 2019-06-09 · from the WORLDHUMMAP archive
A low hum in Germany, Frielendorf
humming of machinery in a distant part of a huge building, as if picked up through bone conduction. Maybe like pressing the ear to the bulkhead of a spaceship you're traveling on. Does the sound fluctuate? To me that's an important characteristic of the sound. It's not a simple steady sound, but one that fluctuates in intensity/volume, from hardly noticable, to very noticable, and the interval. For me, it's irregularly, between 5 and 30 seconds. It has a very organic characteristic, very random. Some volume drop-offs can be as sharp as half a second.
What they reported
First noticed: 2017
Pitch: roughly 70hz, however, when I notice the sound, it's almost like there are two very similar wavelengths out of phase with one another, so the combined intensity fluctuates
Loudest: Equal night and day
Where: Equal indoors and outdoors
Symptoms: Relaxation, sense of tuning in to an "ether" of sorts
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both described a low hum · 143 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