I just started hearing this hum a few weeks ago. It happens at night when everything is quiet in the house and there's no traffic. It finally got me so angry that I walked my entire house and turned off everything that could be making noise, but I could still hear it in every room. I went outside and could barely hear it. I really hope I'm not just going crazy, because my mom couldn't hear it when I turned everything off and tried to show her.
Mine sounds like a droning electrical pulse that lasts several seconds, then stutters, then lasts several seconds, over and over all night. It's giving me a constant headache and making me unable to sleep, which is causing me to be nauseous and leading to me calling out of work because I genuinely thought I was just sick with the flu until discovering this sub.
I genuinely don't know what to do about this. I can't even drown it out with watching videos while trying to sleep.