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. …
both described a low hum
USA, Austin (MN) 55912 · 2018-01-29 · from the WORLDHUMMAP archive
Low throbbing sound, like a diesel engine parked outside the house. More noticeable at night. Seems to come and go. At first I thought it was connected with the trains. A train on a railroad idling somewhere, but the trains never came. When you asked if I was sensitive to sounds, I said "Very much so" but I mean that in the sense that if a TV is on in another room, I can hear its frequency even though the screen is black. However, I don't necessarily have super sensitive ears in the sense that things bother me a lot. Living in this town is the first time I've been bothered by this noise. I've noted it close to 12th St SE and 4th Ave SE, and I'm aware of its proximity to a railroad. However, as I've said before, I'll hear this even when there aren't trains near by, idling, or even scheduled to be running near. When a train is coming or it is near, I'll notice a similar noise, but it only starts within a few minutes of a train passing in the vicinity, and then it will stop again. Whether or not it is the SAME noise, I can't tell for absolute certain. I've lived in other towns where I could hear trains, but I've never heard a hum that's as constant as this. Usually any hum connected with trains is as I've described - starting shortly before a train passes in the vicinity, and then it eventually stops. This hum that I hear in this town is not like those hums.
What they reported
First noticed: 2015
Pitch: 77 hertz? It tends to undulate like a diesel engine does when it idles.
Loudest: During the night
Where: Indoors
Symptoms: Headache, Insomnia, Sense of vibration
Changes with weather: I haven't paid attention.
What stood out: a low hum
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. …
both described a low hum
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 …
both described a low hum
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…
both described a low hum
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 …
both described a low hum
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…
both described a low hum
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, …
both described a low hum
a low, rumbling sound, like a train engine idlying The hum does not bother me. It does not disturb my sleep. But, it is very, very persistent. We live in a town that is a major train depo…
the accounts read alike, found by meaning rather than by shared details
A low pitched, "never ending" hum/buzz. Sounds like a train is approaching (as I live next to the train tracks, I know exactly what that sound from inside the house), but its not the trains,…
the accounts read alike, found by meaning rather than by shared details
Sounds like a big truck idling, or many helicopters are hovering, I can also feel the hum in my home/ in my body like when you feel the bass tones in your body at a concert. I think I'm sen…
the accounts read alike, found by meaning rather than by shared details
Write it down while you still remember the details. We will look for the others.
Tell us what you sawIf this reminds you of something a friend or a relative told you once and never mentioned again, send them this page. Reading that a stranger described the same thing is usually the part that helps.
Nothing is tracked back to you and nothing is sent on your behalf. The link is just the page you are reading.
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.