Cup-in-a-cup structure and assembly method for...

Detection circuit

Dual input headphone apparatus

Dual mode headset device

Dual mode transmission device

Earphone with control device of timing call setting

Electret microphone detection using a current source

Electronic device accessory with ultrasonic tone generator

Electronic interfacing with a head-mounted device

Head tracking with limited angle output

Headphone apparatus

Headphone capable of directly converting digital audio signal in

Headphone driver and methods for use therewith

Headphone driving circuit

Headphone jack extended outlet

Headphone stereo control circuit

Headphone with sound pressure sensing means

Headphoning

Headset

Headset detector in a device generating audio signals