Acoustic calibration arrangement for a voice switched speakerpho
Adaptive energy detector gain control in physical layer...
Adaptive expander for telephones
Adjustable gain range current mirror
ADSL receiver high pass filter architecture
Ambient noise cancellation for voice communication device
Animated annunciator apparatus
Animated annunciator apparatus
Apparatus and method for canceling acoustic echoes including non
Apparatus and method for controlling a volume in a digital...
Apparatus and method for hands free telephonic communication
Apparatus and method for music production by at least two...
Apparatus and method for reducing local interference in...
Apparatus for obtaining a high sound level and good sound reprod
Apparatus in a loudspeaking telephone set for supplying power to
Asymmetric digital subscriber line system capable of...
Attenuation and termination circuit using impedance synthesis
Audibility enhancement
Audio system for conferencing/presentation room
Automated near-end distortion detection for voice...