Echo canceling arrangement
Echo cancellation
Echo cancellation in a full-duplex speakerphone
Echo cancelling method and echo canceller using the same
Echo cancelling system suitable for voice conference
Echo control device with quick response to sudden echo-path chan
Echo reduction for a headset or handset
Echo reduction for a headset or handset
Efficient speakerphone anti-howling system
Efficient use of wire for data communication systems
Electret microphone transmitter for use in telephone circuits
Electrical telephone speech network
Electronic headset telephone
Electronic telephone set
Electronic telephone set with low power hook switch
Electronic telephone terminal having noise suppression function
Electronic voice circuit configuration
End-user control of audio delivery endpoint in a multimedia...
Enhanced acoustic calibration procedure for a voice switched spe
Enhanced low pass filter