Problem with AC and how to solve it

The mechanical noise of a transformer may not affect the electrical at all unless it is the noise is caused by severe overloading In that case, current can vary. Roughly 50% of transformers hum naturally or because of the poor quality of electricity they are supplied.

If the noise is physically transmitted through the wire, like cans and string, contact the utility and request(demand?) a solution.

You have a request for information about RFI? Radio frequency intererence is generated by most electronics but more so by high frequency devices such as digital and video. It is transmitted through the air as opposed to EMI, which is transmitted through wires.

http://www.arrl.org/tis/info/rfigen.html

Thanks Ngjockey, very usefull info. Following your advice, I called the utility. They kept me waiting for about a half hour. I finally talked to someone to whom I could explain the nature of the problem and guess what, this guy is an audiophile!!! He told me that since I was the only one plugged on this transformer I should not hope for any solution on their part unless the transformer blows. He suggested, like some of you guys did, buying some power conditionning. I think I'll do that.

Halogen pot lights were the cause of buzzing in my system.