Circuit to prevent acoustic feedback for a cellular...

Circuit, audio system and method for processing signals, and a h

Circuit, audio system and method for processing signals, and...

Circuitry for characterizing speech for tamper protected recordi

Circuitry for improving performance of electret microphone

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

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

Clampless headset mounting assembly

Class D hearing aid amplifier

Class D hearing aid amplifier

Class D hearing aid amplifier with feedback

Class-d BICMOS hearing aid output amplifier

Class-D driving method for stereo load

Classifier for high speed voiceband digital data modem signals

Clear sound side fill center fill

Clip-type microphone

Clipped speech-linear predictive coding speech processor

Clock radio volume control appraratus

Clock-controlled filtering arrangement

Closed headphones with transducer system