At CES this year Panasonic will be showing off bone conducting headphones that beam music through your body. The Panasonic RP-BTGS10 doesn't go inside your ear or over the ear but outside your ear. The headphone pumps sound with vibrations that move through the bone into the auditory nerve. That means you can listen to music while still listening to everything else in the world.
The headphones also have a bone conducting microphone too, which lets you talk on the phone through vibrations too.