Audio-technica Corporation

Hideki Matsui

Akihito Tamamura

A noise-cancelling headphoneincludes a headphone unit (), a baffle plate () to which the headphone unit is attached, an ear pad () attached to the baffle plate, a housing () attached to the baffle plate, a first microphone () that collects external noise, a first buffer amplifier unit () that performs impedance conversion to a signal from the first microphone and output the impedance-converted signal, a second microphone () that collects internal noise, a second buffer amplifier unit () that performs impedance conversion to a signal from the second microphone and outputs the impedance-converted signal, and a noise-cancelling signal generating circuit () that generates a noise-cancelling signal, based on a combined signal by combining the signal from the first buffer amplifier unit with the signal from the second buffer amplifier unit.

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Fukui, Japan

Hideki Matsui