Data communication method based on inaudible sound at near field

In this paper, we proposed data communication method based on inaudible sound which the most people cannot listen to at near field. The proposed method can transmit some bits data as using mixed high frequencies which are mapped at each data bit. Besides, the proposed method increases the accuracy of data transmission as using cyclic redundancy check for prevention of transmission error. To evaluate the performance of the proposed method, we tested with the proposed method and the result showed 97.5% accuracy. Therefore, the proposed method could be applied at various wireless data communication technology fields.