Sounds like a low pitch hum that stays constant at times and some times the sound gets louder or lower. Just started noticing it about a year or so ago. I have called the gas company, the water company, and the electric company and all assured me that there is no issue with my utilities. The water and gas company came out and physically checked and stated this. Had an extensive talk over the phone with the electric company and was asked to turn off my main breaker and see if I still hear anything. I have twice turned all my breakers to include the main and still hear a hum. I seem to hear it more profoundly in the evening night and morning. Some days I hear it but not so much. I even hear the hum out side my home. I was told by the electric company that once the main breaker is shut off there still is a very little trickle of power that comes in. But very insignificant. In no way enough energy to do anything much less make a sound. I'm in Spartanburg SC. I've watched YouTube videos and the show The Proof Is Out There. I've researched using Google to try to find a cause of this persistent hum but with no success. If any one has an idea I'd like to hear it. I do not have ringing ears. When I'm away from home I don't hear the hum.
What they reported
First noticed: 2020
Pitch: Sine lower end of scale
Loudest: During the night
Where: Equal indoors and outdoors
Symptoms: Headache, Insomnia, Sense of vibration, Anxiety
Changes with weather: In a loud storm it's not noticable.
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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