Swimmers rejoice! Now when you’re training or just exercising, you can put on a pair of Neptunes headphones and enjoy your favorite tunes. This innovative new technology allows swimmers to listen to music while underwater, by conducting sound through the bones in the human skull.
The Neptune headphones send sound waves to the inner ears through swimmer’s cheekbones, resulting in them being able to hear music in their heads.
The device mimics the way dolphins and whales communicate in the water by transmitting sound vibrations.
A waterproof mp3 player streams the music which resonates through the bones and into the highly sensitive cochlea part of the ear.
Official Source: http://www.dailymail.co.uk/sciencetech/article-2437574/Incredible-underwater-headphones-transmit-music-swimmers-ears-vibrating-sound-cheekbones.html