radio music coming from attic at night?

we have high ceilings and the bedrooms are on the side of the house where the Satellite dish (dish network) is mounted. there also is the heating unit mounted to the roof by large metal rods. on the same side.

since we got the dish (we think), we have been hearing a radio station coming thru the vents in the ceiling and keeping us awake all night. it is driving us crazy and we can't sleep. everything in our house is shut off completely at night. no neighbors have anything on and it's perfectly quiet outside.

there is also some sort of radio tower on a hill a couple miles away. on that side of the house.

any ideas to help us?? we don't even know what type of person to call to be able to help us figure this out. it's in all rooms on that side of house, so we can't even change rooms to sleep in.

thanks