Directional microphone with acoustic washer

Directional microphone, in particular having symmetrical...

Directional silicon condenser microphone having additional...

Directional sound wave radiator

Directionally sensitive pointing microphone

Display device with microphone

Distortion reduction in loudspeakers

Dome speaker

Dome speaker with a diaphragm having at least one elongated cut-

Dome type diaphragm and loudspeaker apparatus

Dome-shaped diaphragm and speaker

Door speaker enclosure with integral water barrier and...

Door with structural components configured to radiate...

Double cone-type loudspeaker

Double ended field coil actuator

Double hearing protection device

Double-dome speaker

Double-functioned hand-free device for cellular telephone

Double-resonator micro-speaker assemblies and methods for...

Double-resonator micro-speaker assemblies and methods for...