Brazil, Rio Grande do Sul State · 2019-05-24 · from the WORLDHUMMAP archive
Low frequency noise perceived mainly at night. It sounds like a running engine When I first realized about this sound (in 2014) it seemed to me like the sound of an electric generator powered by a Diesel engine. I never before had heard this sound. At that time I moved from my old home at ground level to an apartment at the 9th. floor in downtown.
What they reported
First noticed: 2014
Pitch: The best match is for 60-50 Hz and triangle waveform
Loudest: During the night
Where: Indoors
Symptoms: Ear discomfort (pain, fullness, throbbing), Insomnia, Anxiety
Changes with weather: No
What stood out: a low hum
Sounds like a distant engine, a low frequency sine sound wave. It is not constant, however. It comes and goes. But it does not sound like it comes from outside, because it is more like a vib…
both described a low hum · on the other side of the country
Oscilating low frequency hum I├»┬┐┬╜ve found out today that this "Hum" is a sound that is reaching all around the world. I├»┬┐┬╜ve been looking desperately for the source since the first tim…
both described a low hum · on the other side of the country
A constant electrical or idle motor type of deep sound that feels like it resonates more than actually sounds. Has made me get out of bed to look for things I might have forgotten to turn of…
both described a low hum · on the other side of the country
a low frequency droning sound that sounds like a deep continuous and constant truck engine heard idling through wooden walls from a distance. when I shake my head side to side(indian wobbl…
both described a low hum · on the other side of the country
It is a dull, so low frequency that it physically hurts my head and will give me a headache. I feel it in the back of my head, and it fills my ears like when you walk into a sound dampening …
both described a low hum · on the other side of the country
Low hum almost like a distant tug boat horn going off repeatedly My wife also heard it and it scared my 6 month old puppy who would not stop pacing back and forth until the humming stopped. …
both described a low hum · on the other side of the country
It is a low-frequency humming noise that has no explanation or source. I hear it mostly at night and inside my home. The noise is similar to a train or a diesel truck engine idling and the…
the accounts read alike, found by meaning rather than by shared details
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 …
the accounts read alike, found by meaning rather than by shared details
it sounds like the engine of a car or a electric generator coming from the ground or another building around. The presence and intensity od the sound vary from very subtil to the impression …
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