Denmark, Copenhagen · 2019-07-01 · from the WORLDHUMMAP archive
A low hum in Denmark, Copenhagen
Low frequency from around 30 to 60 Hz The sound started appearing after I was sick with severe stress. Some people from the authorities of Copenhagen have measured the sound in my apartment with professional equipment. They said there was low frequency noise with a sound pressure of 35 dB. My brother lives in the same building as I, and he can feel the sound but not hear it.
What they reported
First noticed: 2014
Pitch: The tone is blocked out at around 200 Hz, but the tone itself is around 30 Hz. (Un)fortunately the sound is not there today, but I have played with the tone generator before.
Loudest: During the night
Where: Indoors
Symptoms: Ear discomfort (pain, fullness, throbbing), Insomnia, Sense of vibration, Anxiety
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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