Patent ID: 9536515
Date: 2017-01-03
CPC Classifications: G10K,H04R

Claim:
1. A headphone device comprising: a first housing and a second housing; a headband connected to the first housing and the second housing; a first headphone unit and a second headphone unit disposed in the first housing and the second housing, respectively; a first microphone and a second microphone arranged in the vicinity of the first headphone unit and second headphone unit; and a signal processing unit disposed in the first housing and configured to: wherein the microphone signals of the second microphone, having high output impedance, disposed in the second housing are supplied to a buffer circuit having low output impedance, and the output signals of the buffer circuit are supplied to the signal processing unit via a first cable arranged in the headband, wherein the buffer circuit comprises an emitter follower transistor circuit using a transistor, and wherein the second noise-canceled audio signal is supplied from the signal processing unit to the second headphone unit disposed in the second housing via a second cable arranged in the headband.