A hands-free communication unit having residual acoustic echo suppression means for suppressing residual echoes which have been left unremoved by an echo canceller, a bilateral communication system and a method for suppressing residual echoes

摘要

A communication unit having an acoustic echo canceller for cancelling an acoustic echo caused by a received voice signal amplified through a loud speaker returning to a microphone, said communication unit comprising: means for suppressing a transmitted residual acoustic echo signal left unremoved by said acoustic echo canceller owing to a peripheral noise by means of inserting a loss corresponding to said peripheral noise into a transmission path side. IMAGE