I'd either suicide or be depressed for a really long time. Seriously, music is such a huge part of my life that I don't know how I could handle not being able to hear shit anymore. The only comfort for me would be the fact that I would never have to hear Nickelback ever again for the rest of my life.
I would be really sad and experience utter depression and unhappiness. I would still go to concerts and clubs because I could still feel the loudness of the music throughout my torso and legs.