Secure digital speech communication

Signal compression system

Signal distribution with user-configurable ground-loop control

Signal encoding and decoding method and device

Signal pattern encoder and classifier

Signal processing

Signal processing apparatus for separating voice and non-voice a

Signal processor for analyzing distortion of speech signals

Simultaneous interpretation system

Smart audio receiver that automatically select an input audio so

Sound amplifying apparatus with automatic howl-suppressing funct

Sound concentrator for selectively collecting sound and concentr

Sound control system, sound control device, electronic...

Sound device provided with a geometric and electronic...

Sound device provided with a geometric and electronic...

Sound display systems

Sound field simulation system and method for calibrating same

Sound pick-up and reproduction system for reducing an echo...

Sound reinforcement system having an echo suppressor and...

Sound reproducing screen for an ultrasonic converting and...