New room mate hears my tv

[lnx64]

So I moved out of home with my father. I moved in with a friend. But here's a problem, she is apparently able to hear a very high pitched sound even with the volume down. I can't hear a damn thing but apparently it's so loud she can't sleep at night and says its nearly deafening.

I'm afraid to think she's just hearing stuff but I really do feel she hears a high pitched sound from my tv.

Is this a problem with the TV? I swear I hear nothing at all. But she did know I just turned on the TV because she commented on it before I mentioned I turned it on.