USA Richmond 94805 · 2018-03-19 · from the WORLDHUMMAP archive
A low hum in USA Richmond 94805
It sounds like a large truck idling - the noise rises and falls cyclically I was always sure the sound was real because I could feel the wood floor boards vibrating, as well as hearing the sound. I just could not figure out where it was coming from. Some people in my neighborhood thought it might be train engines idling - this would be about three miles away but low frequency sounds do travel a long way. I thought perhaps it was road repair on the freeway not far away which would have to be done at night, but I had no way to find out whether any work was being done. Thankfully, the noise went away some time ago.
What they reported
First noticed: 2008
Pitch: Around 25 Hertz resembles the sound to the best of my recollection
Low frequency hum, always same frequency, I'd estimate around 50hz (at least my perception). I only hear it at/in my home, if I'm at another location, I don't think I've ever heard of it. …
Low pitch hum estimating around 50-100hz The sound is not a perfect pure tone, and has slight volume changes, it sounds similar to the hum of a fan motor. I have driven around in an attempt …
A low frequency Hum sound that fluctuates subtly but for the most part is steady The Hum is a low frequency and droning sound and it kind of fluctuates in tone.. almost like an idling diesel…
Very low-pitched continuous drone. Pitch rises and falls slightly but can remain steady at times. Inaudible to my wife. Reminiscent of the hum from a large transformer/sub station but there …
Low, soft rumble - as if a large truck were idling in the distance - it varies, but not rhythmically - I can almost "feel" the vibrations. Most predominantly at night, in the bedroom on the…
Low hum, sometimes pulsating, sometimes not. It is very loud. It sounds like a propeller airplane way off in the distance, but it doesn├»┬┐┬╜t go away. Or an 18-wheeler on a busy freeway, …
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
Constant low but distinct, penetrating, background rumbling droning noise which surges/pulses similar but not the same as a parked car or lorry engine idling in the near distance. Can hear e…
the accounts read alike, found by meaning rather than by shared details
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
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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