Patent ID: 8194876

Claim:
A sound transmission system using a human body as a propagation medium, the transmission system comprising: a first signal transmitter for generating an audio signal and a first high frequency signal which has a frequency at least higher than an audible frequency bandwidth; and a second signal transmitter for generating an audio signal and a second high frequency signal which has the same frequency as the first high frequency signal and has an opposite phase of the first high frequency signal, the first and second signal transmitters coupled to the human body, wherein the audio signal from the first signal transmitter and the audio signal from the second signal transmitter are the same, wherein the first signal transmitter combines the audio signal and the first high frequency signal to output a first combined signal to the human body, and the second signal transmitter combines the audio signal and the second high frequency signal to output a second combined signal to the human body, wherein the first combined signal and the second combined signal are output at the same time, and wherein the first and second high frequency signals among the signals output by the first and second signal transmitters are eliminated by interference around ears of the human body so that only the audio signals are delivered to an auditory organ of the human body, wherein the first and second signal transmitters respectively comprise a corrector which performs calibration on a signal output based on transmission characteristics of the human body and a distance between the auditory organs and the respective first and second signal transmitters.