Sony has found a way to transmit radio signals through a wearer's body to earphones that convert the signals back to sound. Sony applied for a patent for a "human body communication system and communication device."
The system would use the body as a capacitor that is part of a field carrying an electrostatic charge from a transmitter to a receiver. Conductive cloths and fabrics would charge the users' bodies. Earphones would contain electrodes for receiving and translating the signal into sound.
The charge would be mild and would not cause tingling, according to the company's statement in its patent application. The communication device would be secretive, and could operate without interference from other radio devices in a neighborhood, which the Sony application points out is a problem with Bluetooth.
The body system could carry 48 kilobytes of data per second, according to Sony's application, which repeatedly calls its setup an "excellent" body communication system.