Directional tone color loudspeaker

Directional-microphone and method for signal processing in same

Directional/omni-directional hearing aid microphone and housing

Directionally sensitive pointing microphone

Directivity controlling apparatus

Discrete dynamic positioning of audio signals in a 360.degree. e

Discrete multi-channel/5-2-5 matrix system

Discrete parallel path modulation multiplexer

Discrete surround audio system for home and automotive...

Discriminating between stationary and non-stationary signals

Disk diaphragm for a loudspeaker

Display device with microphone

Display device with sound module

Display showing waveform of an audio signal and...

Disposable audio processor for use with implanted hearing device

Disposable extended wear canal hearing device

Disposable foam sleeve for sound control device and container th

Disposable hearing aid

Disposable hearing aid with integral power source

Disposable modular hearing aid