Card type MEMS microphone

Card-type sound apparatus and electronic appliance provided...

Cascaded transducer array arrangement for control over an...

Case for containing electrical instrument

Casing of condenser microphone

Ceiling loudspeaker

Ceiling microphone assembly

Ceiling tile loudspeaker

Center channel speaker having multiple interconnected backload a

Centering device for speaker diaphragm

Centering diaphragm

Ceramic metal matrix diaphragm for loudspeakers

Ceramic metal matrix diaphragm for loudspeakers

Ceramic metal matrix diaphragm for loudspeakers

Ceramic piezoelectric type microphone

Cerumen protection system for hearing aids

Chair equipped with a speaker

Chin loop headset

Chord-like vibration loudspeaker

Circumaural ear cup audio seal for use in connection with a head