Telephone with automatic pause responsive, noise reduction muting and method

摘要: A telephone with an automatic muting circuit that mutes the microphone in response to detection of speaking pauses local user reduce noise due acoustical feedback are detected by comparing waveforms from and audio speaker after being amplified amplifiers gain control circuits same level speech subtractor. During when signals compared substantially same, then is activated subtractor mute but speaks into subtraction does not yield a null result unmuted.