I just moved into a condo I'm renting for a month and the first two nights were fine, but on the third night I was awakened by a low humming sound. It actually woke me up. I had no idea what it was and checked the clock, the light, etc. I realized the sound was coming from the wall behind my bed. I eventually went outside the unit and found to my surprise that the electric meters were on the exterior wall and thus that's the source of the noise. This low humming was so irritating I got up and slept on the couch.

I noticed in the morning the humming had stopped. At approximately 7 pm the next evening I heard a "clunk" and the humming started again. I put two and two together and realized the meter was cycling - during the day there was no hum, and at night when it switched off (or whatever it does, I guess for the night time rates), this low hum comes from the meter through the wall.

I have contacted the condo management about this but somehow I doubt anything will be done about it, but want to know if anyone else here knows what's going on? Is this a smart meter? It makes a clunk when it goes off in the evening and a clunk when it goes on in the morning at around 6 a.m. As indicated, during the day, all is fine and no humming (I turn the t.v. off and it's clearly not making the sound or hum it makes at nite). I'm really ticked off that a builder would have meters on an exterior wall of a bedroom where people sleep, but that's the way it is. Naturally I hope the low hum can be stopped but if not I'm stuck sleeping on the couch for the month I'm renting this corporate condo. Lucky me, huh?

Any suggestions appreciated before the "management" checks this situation out!