Costa Rica, San Isidro de Heredia · 2019-03-13 · from the WORLDHUMMAP archive
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 off, or sometimes look for the truck whose motor has been running for so long. I usually hear it only at night or when everything else is really quiet. I am more perceptive of the Hum when I have a migraine
What they reported
First noticed: 2014
Pitch: 57 Hertz sine
Loudest: During the night
Where: Equal indoors and outdoors
Symptoms: Headache, Nausea, Sense of vibration, Anxiety, dizziness, disorientation
Changes with weather: No
What stood out: a low hum
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A low-frequency hum that I perceive occasionally when it is quiet, typically while in bed, before and after sleeping. Thank you for providing this data collection facility. While I consider…
both described a low hum · on the other side of the country
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both described a low hum · on the other side of the country
Constant humming frequency, I only hear it at night, loudest from inside my house. It sounds like a generator or vehicle running in the distance. It changes it's pitch or something pretty f…
both described a low hum · on the other side of the country
Annoying AF. A low rumble like a truck engine revving. I feel the vibration in my whole body and even my eyeballs if I focus on it. Louder at night, but I hear it during most of the day if I…
the accounts read alike, found by meaning rather than by shared details
Low and rumbling, it pulses, it can go through walls and is louder at night. I started hearing it last winter. It's painful and distracting. This is something I think I've probably heard my …
the accounts read alike, found by meaning rather than by shared details
it is like an uneven engine, it doesn't seem to be the AC that is an even hum for example but more like an idling car engine but it feels like coming from the walls. It is not a "sound" but …
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