Dear Barry: I have an intermittent buzzing sound in my bathroom wall, and it’s driving me crazy. Since then I have had a continual humming noise in my house and sometimes it is very loud. ... My wall started buzzing last week. That activity can also cause a scratching, buzzing noise. Wiring and outlets : These elements can hum for a variety of reasons, many of which signify danger. Look at them coming and going out of the window right there.” She says, “Oh, we saw that, but we didn’t think that that was in the wall.” The noise repeats every 5-10 seconds or so, and sounds like something mechanical inside the wall is shaking loose or vibrating against something. The lower level is half way underground. It only buzzes between sunset and 11pm every evening and is very noisy. Unless the hum becomes a loud buzzing sound, the mains hum is normal and harmless. It only buzzes between sunset and 11 p.m. every evening and is very noisy. DEAR BARRY: I have an intermittent buzzing sound in my bathroom wall, and it’s driving me crazy. Who to call: An appliance repair specialist Actually, it could be the compressor motor. I have noticed lately there is a buzzing sound coming from in the wall around where the doorbell chime is. In addition, when I turn off just the furnace switch, which the doorbell draws power from, and the buzzing stops. It is a conventional boiler. Sometimes we’ll have some folks that hear a funny noise in the wall, and you’ll say, “Ma’am, you’ve got a yellow jacket nest. I have tried turning off the electrical power at the main, turning off individual circuit breakers, and shutting off the water main, but the noise continues each evening. It is very consistent. No noise as such is coming from the boiler. Within the last month I've been hearing a loud buzzing noise inside the wall of our front room, which is the study. Humming From the Refrigerator Cause: "That's the gremlins inside eating your food," jokes Dawson. I have isolated the buzz to a specific circuit, which is what the doorbell and thermostat is on. After the heating goes off there is a very loud noise as if the boiler is on which continues for over an hour and then quietens a little. The buzzing sound is unlikely to be dangerous, as the circuit breakers will trip if a serious fault occurs. New refrigerators shouldn't make any noise. It sounds like the sound of a bathroom fan or the sound of fluorescent light fixtures. It's not a "white noise" comforting sound like a fan. The number-one cause of unusual audio noise and weird video is the ground loop, simply because it’s so darned easy to create. Fridges are full of electrical devices, he says, that can cause all sorts of problems. Two weeks ago, the noise was happening every 3 minutes and lasted a couple seconds. It's an ugly sound; not rumbly, but smooth, but thick and like GRRRRRRRRRRR. I have tried turning off the electrical power at the main, turning off individual circuit breakers, and shutting off the water main, but the noise continues each evening. The most common manifestations are a loud … It can't be the building settling; it would have collapsed by now if that was the cause. It's so loud it sounds like the insect is inside the room, such as when a fly gets in and buzzes loudly against the window. However, you need to get replacement breakers at the earliest opportunity. The noise sounds like the thick hum or drone of a pump motor; it's even-pitched and pervasive, reverberating through the walls. Every now and then, I would hear a loud buzzing/grinding noise coming from one of the hallways in my apartment. Can hear neighbors through wall?