Mine do that too, mostly during the night. I only hear one side of the conversation, some guy talking on a cb. I take it he is talking to the truck drivers on the near-by interstate, but he lives just a little bit up the road from me. He was telling someone the other night approximately where he lived, so that's how I know. And just yesterday, I heard it on the phone while I was talking. The girl I was talking to thought I was crazy, but it was that guy sitting there chattin with someone. Weird sh!t, huh?