Ceramic microphone

Cerumen filter for hearing aids

Chord-like vibration loudspeaker

Circuit and method for providing an auto-off and/or auto-on...

Circuit and method for the adaptive suppression of noise

Circuit arrangement having a switching amplifier

Circuit arrangements for modifying dynamic range

Circuit for generating a control voltage depending upon the...

Circuit for imposing a d.c. level on an a.c. signal

Circuit for suppressing noise caused by scratches on a...

Circuit for suppressing noise caused by scratches on a...

Circuit integrity checking means for audio signal circuit

Circuit, system and method for adjusting an audio signal

Circularly symmetric, zero redundancy, planar array having...

Click free mute switch circuit for telephones

Click-free muting circuit for headset

Coaxial line source loudspeaker

Coaxial loudspeaker system

Coaxial two-way drive unit for horn speakers

Cochlear electrode implant assemblies with positioning...