Help: Annoying low frequency hum in my wall
Hi there, I'm a podcaster, and also an annoyed guy who can't sleep. There's a loud, low frequency hum in my wall. It comes off and on, and it comes on especially around night. It now comes on every single night.
The sound is from between 0-100hz, rolls off around 100. I've seen some other posts about similar problems. That I could be electrical. But I had an electrician by, he said it wasn't. He didn't really do much though, he just said there were no outlets near the hum. I turned off my breakers in the unit... possibly something from the neighbours downstairs?
My landlord doesn't seem to think there are any pipes in this wall, but I'm not sure of anything. I can really clearly hear it coming from this particular wall, and I can't hear it in other rooms in the house. Also, there's power boxes and things near that wall outside, from the utility company, but I can't seem to hear it outside. Just in this particular corner, near this particular wall, which, most annoyingly, is between my studio and my bed. Any ideas?
Check the photo for a frequency analysis, and I even recorded it, here. Any help would be so clutch.
