Kabushiki Kaisha Audio Technica

The University of Toyama

National University Corporation University of Toyama

Koichiro Tanoue

Kenji Arai

Kenzo Tsuihiji

Yoji Honda

Satoshi Uchimura

Hiroyuki Matoba

Koichi Maezawa

An electroacoustic transducer includes a driver, a diaphragmdriven to vibrate by the driver and emitting sound, a baffleholding the driver and the diaphragm, first openingsextending through the baffle, an acoustic resistordisposed on the back side of the baffle, and second openingsextending from the front side to the back side of the acoustic resistor. The baffleis provided on the back side of the diaphragm. The first openingsare provided in the baffle. The second openingsare each disposed above one of the first openingsin the acoustic resistor. The electroacoustic transducer exhibits an excellent frequency response even if a sufficient volume of a space is not provided on the back side of the diaphragm

Electroacoustic transducer and acoustic resistor

A wiring structure is provided for an electroacoustic transducer directly converting digital signals from a single sound source to sound waves without conversion to analog signals. The structure includes a diaphragm, and a plurality of voice coils fixed to the diaphragm. The voice coils are connected to respective cables each consisting of a stranded pair of positive and negative input lines.

Wiring structure for electroacoustic transducer for digital signal and headphone for digital signal

An electroacoustic transducer includes a driver, a diaphragmdriven to vibrate by the driver and emitting sound, a baffleholding the diaphragm, first aperturesextending from the front surface to the rear surface of the baffle, and a first acoustic resistordisposed on the front surface of the baffle so as to cover the first apertures. The electroacoustic transducer includes a plurality of sound paths for guiding the sound generated by the diaphragmto the rear surface of the baffle

Electroacoustic transducer

Provided is a headphone unit including a housing having a convex portion and accommodating a driver unit, a support in contact with part of the outer surface of the convex portion, and a frictional member in contact with the support and the outer surface of the convex portion. The frictional member generates greater friction against the convex portion than the friction between the support and the convex portion. The housing is swingably joined to the support.

Headphone unit and ear muff unit

A digital microphone includes: a cavity resonator operatable in a micrometer, millimeter, or electromagnetic waveband, the cavity resonator having a metal wall including a conductive membranethat vibrates in response to incident acoustic waves and converts the shift of the membraneinto a resonance frequency of the cavity resonator; an FM-signal generator that modulates the resonance frequency of the cavity resonator in response to the shift of the membraneand outputs FM signals from the metal wall other than the membrane; and a &#x394;&#x3a3;-modulated-signal generator that generates &#x394;&#x3a3;-modulated signals from the FM signals. The FM-signal generator includes a slot, a micro-strip line, and a negative resistive element. The &#x394;&#x3a3;-modulated-signal generator includes an edge detector

Growing community of inventors

Tokyo, Japan

Koichiro Tanoue