What is that strange noise coming from my appliances?

Question

Frequently my TVs, radios, and stereos emit this loud buzzing noise, even when they are turned off. It's been happening for a few months now, and as time goes by the noise seems to come more and more frequently. What is it? It sounds like a broken electronic buzz... sometimes it even makes popping noises.

Answer 1

Cellular phones can cause interference like this just as they are about to ring. In fact any device that creates radio-magnetic interence could be the culprit. It might be a badly shielded electric motor that comes on intermittently, but I would first suspect cellular or even cordless phones.