An open record of things people cannot explain

Clark County, Camas · 2019-05-24 · from the WORLDHUMMAP archive

A low hum in Clark County, Camas

it sounds like a diesel engine idling outside I literally was awoken in the middle of the night to what sounded like a semi-truck idling outside of our house... the sound is a vibrating noise. I searched everywhere and couldn't find the source of the noise... I go outside and cannot hear the noise. I go upstairs the noise intensifies, especially in the south facing rooms. We live on a hill overlooking a valley. There are power lines cross the bottom of our acreage. We've lived here for 9 years and I've never had anything like this happen. Now that it started it won't stop. Trying to go to sleep at night is challenging to say the least.

What they reported

First noticed: 2018

Pitch: 175Hz Sine - with volume turned way up this most closely matches my 'hum', however what I hear is still deeper 'vibration'.

Loudest: During the night

Where: Indoors

Symptoms: Insomnia, Sense of vibration, heart palpitations

Changes with weather: Doesn't seem to, but I will make note as the weather changes.

What stood out: a low hum

 

Others who described something like this

2019-05-27

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…

both described a low hum

2019-03-25

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…

both described a low hum

2019-08-19

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)…

both described a low hum

2019-04-25

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 …

both described a low hum

2019-06-17

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 …

both described a low hum

2019-12-26

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…

both described a low hum

2020-09-26

Low frequency - sounds like an airconditioning unit or low frequency diesel truck in the distance. Is louder sometimes than other. Sometimes really loud - particularly at night when everythi…

the accounts read alike, found by meaning rather than by shared details

2021-10-11

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 n…

the accounts read alike, found by meaning rather than by shared details

2024-10-29

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

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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.