Device for picking up bone-conducted sound in external auditory

Double-functioned hand-free device for cellular telephone

Dual mode transducer for a portable receiver

Ear microphone utilizing vocal bone vibration and method of manu

Electronic driver for an electromagnetic resonant transducer

Headrest and mobile body equipped with same

Mechanism of vibration type microphone

Method and apparatus for tooth bone conduction microphone

Method and apparatus for tooth bone conduction microphone

Microphone mounting for a person's neck

Musical massager

Noise damping headset with a throat microphone

Osseous conduction acoustic transducer

Transmitter-receiver having ear-piece type acoustic transducing

Two active element in-the-ear microphone system

Voice transducer

Wearable communication device

Wireless hands-free apparatus with sound-absorbing function