Noise-suppressing Compact Microphone/receiver Unit

摘要

A super-compact microphone/receiver unit comprising a bone-conductive microphone and air-conductive microphone and a sound control method for mixing sounds from them according to the ambient noise level is proposed. The unit makes telecommunication feasible in an environment 20 dBA noisier than the noisiest one in which an ordinary air-conductive microphone can be used. The units were supplied to The Organizing Committee for the XVIII Winter Games, Nagano 1998 (NAOC).