Ok this question is a weird one, but I want to find out if other people have observed this or if I'm just a freak. I'm talking about that high pitched noise that can be heard when you first turn on a tv. For me, if a TV is on in my house I can always hear that noise from from at least several rooms away. With most TV's it blends in enough with background noise that it doesn't bother me, but I recently bought a TV that's louder than most, and I'm returning it because of this. I don't notice this sound at all on my HDTV. Does anyone know what I'm talking about or am I going crazy? What causes this?