USA, Belgrade · 2019-11-17 · from the WORLDHUMMAP archive
A low hum in USA, Belgrade
Low throbbing hum. Usually on an regular interval, rising and falling, with a 2-4 second period. It’s hard to determine if it’s airborne or structure born. Usually earplugs have little to no effect on the amplitude. Usually at night, easier to hear indoors. Will generally last 2-6 nights and then be gone for several weeks or months. It’s frustrating being a technical sound and acoustics person and not being able to identify the sound source.
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) this is the hum that I hear, around 50Hz a…
It started 9 years ago in my apartment as an intermittent low "buzz pulse" with no rhythm - usually noticed it more when I was going to bed. I never found the source - thought maybe it was a…
Low humming sound, feeling of vibration in head near ear. Morning and all night. Other sounds can cancel it out. It does not overlay it.. But the humming suddenly breaks if any sound (music)…
Low frequency hum with oscillating intensity much like an idling engine. Heard or felt more easily at night from inside the house. Wearing earplugs does not reduce it but rather enhances it …
Sounds as if a 4 to 6 cylinder diesel engine running in the distance. I disconnected my electrical power to the home once to test if the Hum is being generated by the power grid. It made no …
Low continous sound, like a diesel generator or tractor that revs at around 1500 rpm per minute, although distant, like it is running approximately 500 - 1000 meters away. Very low frequency…
A low, persistent hum that I can only hear at night - most nights but not every single night. It doesn’t have a source that I can find - it seems omnipresent and never varies in pitch or vol…
the accounts read alike, found by meaning rather than by shared details
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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