USA, Hoffman Estates · 2018-11-09 · from the WORLDHUMMAP archive
A low hum that starts out in short, infrequent bursts, and then increases in both frequency & length of time. As it increases in length, it manifests itself as a simultaneous hum/pressure felt in my head (sinuses/back of the head) & chest, and often causes me to have to release pressure in my ears, like one experiences in a plane. It occurs after 10:00 pm & can last as little as an hour, or as long as 3-4 hours. I first noticed it during the summer of 2017, and attributed it to some major ongoing nighttime infrastructure repairs to the Interstate that is approximately 8 minutes from my home. I've heard the sound intermittently since that time, and the repairs to the Interstate were completed months ago. I will go 2-3 months without hearing it, and then experience the sound for several nights in a row. During the hum, I feel cranky & out of sorts, and afterwards I feel drained & off balance. My husband does not hear it, nor does it appear to affect our pets.
What they reported
First noticed: 2017
Pitch: 41 hertz
Loudest: During the night
Where: Indoors
Symptoms: Ear discomfort (pain, fullness, throbbing), Headache, Insomnia, Sense of vibration, Anxiety
Changes with weather: I've heard it in all types of weather, except rain or thunderstorms.
What stood out: a low hummoving in formationa change in air pressure
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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