I don't understand how it happened, but I hear a high pitched noise constantly. I don't even listen to music all that often, but when I do it's pretty loud I guess, and using cheap earbuds. If I'm in a quiet room, the sound I hear is like thunder. But If I'm playing a game, watching TV, or any other activity with ambient noise, it's almost unnoticeable. What do you guys think? Has this happened to you? Should I get my hearing checked out? Also, I was thinking about investing in a sound card and a nice set of headphones, is that a waste of money if my hearing is shit?