Italy, Trento · 2019-05-27 · from the WORLDHUMMAP archive
A low hum in Italy, Trento
It is exactly like in this video (I found it after some days, after a research for the hum source, without knowing the existence of this recording)
https://www.youtube.com/watch?v=hPAt8bIxgjk this is the hum that I hear, around 50Hz and sine wave, for reference https://www.youtube.com/watch?v=hPAt8bIxgjk
What they reported
Pitch: the hum is almost exactly like this https://www.youtube.com/watch?v=hPAt8bIxgjk
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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