USA, Pittsburgh · 2019-03-26 · from the WORLDHUMMAP archive
Sounds exactly like there is a large truck idling down the street outside. but I can actually feel the noise vibrating and pulsing inside my eardrum. The way it goes in and out mimics the sounds that a truck engine makes because it's not one long consistent hum, it goes in and out. It makes me uneasy because it feels like there is activity in my quiet neighborhood that shouldn't be here at 4 AM. I often used to go out on the porch to check who is idling outside.
What they reported
First noticed: 2018
Pitch: Sine - 179 hertz volume up all the way
Loudest: During the night
Where: Indoors
Symptoms: Sense of vibration, I notice my ears feeling itchy now which they never did before. Probably not related, but worth noting I suppose.
Changes with weather: Not sure
What stood out: a low humpulsing light
hum, a mechanical noise, continuous, never-ending, somewhat pulsating, varying intensity, always from south, I hear it inside my closed house (all else quiet) on southern side, I do not hear…
both described a low hum · pulsing light · 323 km away
Low throbbing I am able to hear many things others cannot, such as the humming of electronics (lights, CRT monitors/TV's, etc.), music being played far away, road construction several miles …
both described a low hum · pulsing light · 342 km away
ohhhh Wow...thank you thank you thank you....so I'm not crazy!!! I am sensing something. I live in the NE US. I can certainly relate to this, I hear/sense it a lot, usually late in the ev…
both described a low hum · pulsing light · 328 km away
A single, low frequency oscillating or pulsing sound that fades in and out. Oscillatory period can vary from approx. 2s to 3s; 50-60hz. the sound could be partially 'masked' by white noise o…
both described a low hum · pulsing light · 336 km away
It comes an goes , it's rarely a constant , however the hum sustaines for minutes on end at times , pulsating as well . I've looked into Flightradar24 & there is a refinery near my location…
both described a low hum · pulsing light · 364 km away
It is a very low, alternating two-tone droning, never stops, seems louder at night. I bought a white noise machine to mask it at night, but the sound vibrates underneath all the nature soun…
both described a low hum · pulsing light · 374 km away
Like a big truck idling I have located the source of the hum in my case, it is usually a car idling near my house, inside my house the sound of the idling gets amplified and produces that hu…
the accounts read alike, found by meaning rather than by shared details
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
A low rumbling sound that I can also subtly feel in my body. The rumbling sounds and feels like an idling truck and starts around 10 p.m., but it can sometimes start a little earlier (around…
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