Center point stereo field expander for amplified musical...

Centering device for speaker diaphragm

Centering diaphragm

Centralizing of a spatially expanded stereophonic audio image

Centrally controlled voice synthesizer

Ceramic metal matrix diaphragm for loudspeakers

Ceramic metal matrix diaphragm for loudspeakers

Ceramic metal matrix diaphragm for loudspeakers

Ceramic microphone

Ceramic piezoelectric type microphone

Cerumen barrier for custom in the ear type hearing intruments

Cerumen protection system for hearing aid devices

Cerumen protection system for hearing aids

Chair equipped with a speaker

Channel audio signal encoding method

Channel down mixing apparatus for car audio system

Character voice communication system

Charge/discharge control circuit for audio device

Chin loop headset

Chip microphone and method of making same