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Development of Optical Wireless Audio System Using Infrared Light Communications

A simple prototype of an optical wireless audio system by using Infrared (IR) as a source for the transmitter has been proposed. In this project, we designed and implement a wireless optical transmitter and receiver system that established an audio communication at some distances with weak signal via infrared communication. In addition, this project also proposed infrared communication at certain angle which is a new solution or techniques to undertaken the characteristic of light that propagates in a straight line although the signal is very low or weak over long distance. The wavelength that used for this project is 870nm which is infrared wavelength range. Based on the experimental results, the infrared communication system can work successfully within in distance up to 10 meters and sensitivity angle of the photodiode at receiver that view the infrared light coming from the transmitter is up to 140˚. This project is successfully improved the transmission distance and signal coverage area effectively with low cost of hardware, high communication speed and almost no limit to bandwidth.