Acoustic apparatus and headphone

Acoustic reproducing apparatus

Active noise reduction microphone placing

All-in-one headset

Amphibious personal audio system

Apparatus and method for transmitting sound

Audio apparatus

Audio device

Audio headset

Audio output apparatus and audio processing system

Audio signal amplifier circuit and a portable audio equipment us

Audio signal reproducing apparatus

Audio signal reproducing apparatus

Audio signal reproducing apparatus

Automated voice over internet protocol wireless headset

Automatic stereo/monaural headphone

Circuit and method of 3-wired interface for headphones

Connector device for detecting insertion or removal of plug...

Connector device for information-handling apparatus and connecto

Crosstalk cancellation using load impedence measurements