Wireless headphones are great in theory, but in practice they tend to be bulky and not really worth the snipping of wires. The problem is that you need to cram a Bluetooth receiver into something that's supposed to comfortably rest on your ears, which isn't that easy to do. Apparently Sony realizes this, so Sony Tokyo's research lab has found a way to send music signals directly through your body. Because the signal is sent through a tiny electrostatic charge, Sony uses a high frequency signal, which is digitally switched to carry data at 48 kilobytes per second without it becoming a painful experience.It uses the listener's body as a capacitor that carries a tiny electrostatic charge. A pair of conductive ear pads in the headphones pick-up the signal and rapidly convert it back into sound.

Existing wireless headphones use Bluetooth radio, but this means pairing two devices beforehand and is prone to interference from other equipment. Another approach – infra-red – relies on line-of-sight, which is rarely practical.If a music or video player sends a fluctuating signal to a conductive cloth pad – such as a wrist band – and this slightly charges the wearer's body.Just a few millionths of an amp flow through the wearer's body, so there should be no nasty tingling effect.Somehow I think that some audiophiles would love to brag about being able to withstand the pain of transmission to get hot 320 kbps quality listening.
Source