I use an MP3 player when I go to the gym, and I often find myself turning up the volume to drown out outside noises (such as the radio I don't want to listen to). I've read that MP3 players can cause permanent hearing damage at high enough levels, so I want to be more careful for now on. Which affordable headphones do you guys recommend for protecting hearing? Do hearing doctors recommend any specifically? Also, I use the Sansa Clip. How can I determine how low to keep the volume to prevent hearing damage? I can't find out how many decibels 100% volume equals out to. Thanks.