Directional communication systems
作者： Peter P. Tong , Kwok Wai Cheung , C. Douglass Thomas
DOI:
关键词: Audio electronics 、 Communications system 、 Engineering 、 Hearing aid 、 Audio signal 、 Phone 、 Ambient noise level 、 Speech recognition 、 Computer hardware 、 Aperture (computer memory) 、 Interface (computing)
摘要: A wireless communication system based on a directional speaker is disclosed. The can include an interface unit and base unit. audio signals from the be generated by transforming ultrasonic in air. This allows production of even when aperture has dimensions order few centimeters. heard hands-free. Further, privacy protection enhanced. In one embodiment, attached or integrated to piece clothing at shoulder user, with directed towards user's ears. applied number different areas, including device, such as cell phone; hearing aid; entertainment system; computation system, personal digital assistant computer. personalized characteristics ambient noise level environment.
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