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An Innovative Hearing System Utilizing the Human Body as a Transmission Medium
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- Authors
- S. E. Kim, T. W. Kang, J. H. Hwang, S. W. Kang, K. H. Park, S. W. Son
- Issue Date
- 2013-08
- Citation
- Asia-Pacific Conference on Communications (APCC) 2013, pp.479-484
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- An innovative hearing system utilizing the human body as a sound transmission medium is suggested. By using the human body as a sound transmission medium, sound transmitter and transmission line can be replaced with the human body. Instead of a sound transmitter, the proposed system generates sound in the body. The theory for generating audible sound is based on self-demodulation. When two ultrasonic waves with different frequencies are transmitted through a nonlinear medium, the self-demodulation effect produces an audio signal at the difference frequency of two waves. The self-demodulation effect allows the user to hear the audible sound without a sound transmitter and without making any other noise outside. Moreover, ultrasound can avoid the interference from the noise in the body, reducing the distortions in the propagation process. By substituting a transmission line with the human body, wireless sound transmission is possible. In this paper, a modulation method for the proposed system is suggested and a model of the human body as a transmission medium is analyzed. To estimate the probability of sound generation in the human body, ultrasonic characteristics of a phantom material that approximates the human body is measured. And the novelty of this innovative hearing system utilizing the human body as an intuitive service is discussed. © 2013 IEEE.
- KSP Keywords
- Audible sound, Audio signal, Difference frequency, Different frequency, Human Body, Modulation method, Self-demodulation, Sound generation, Sound transmission, Transmission line, Transmission medium