There's a common misconception that deaf people can't appreciate music. Sure, they can't hear it in the same way as those of us with normal hearing, but with a typically enhanced sense of touch, they feel the music in a way most hearing people can't.
To feel the music, you'll need something that can vibrate more than just your eardrums, and that's where the Music For Deaf People collar comes in. Instead of regular speaker drivers, the collar has several small membranes that transfer vibrations into the wearer's neck, shoulders and collarbone. A built in radio and an MP3 player connection provide the tunes, while controls near the ends of the collar let you adjust the volume, and change the track or station.
Okay, so they should probably work on the name. Perhaps something more like that similar device from the '80s called the Bone Fone would work.