"Prometheus" wrote in message
...

As an interesting aside, my window shaker AC unit in the bedroom plays
music very softly when it's running. Took quite a few times getting
up to see which radio had been left on before I tried turning that
off, and the quiet tunes stopped. Must be some kind of wierd thing
with the fan spinning inside a farraday cage, or my brain is just
filling in the static, though it doesn't happen with a white noise
machine. I figure it's probably not me, though- it's usually stuff I
don't listen to, and comes complete with commericals.

Could that be a neighbors radio playing? If you are letting outside air
mix, the sound could be coming in when the unit is on and its out side air
door is open.