Patent ID: 8873765
Filing Date: 2014-10-28
Classification: G10K,G10L,H04R

Abstract:
1. A noise reduction transmitter, comprising a noise insulation cover worn on and covering at least a user's mouth, a transmission microphone arranged in said noise insulation cover, a noise detection microphone arranged outside said noise insulation cover to detect external noises, a noise component cancellation circuit for generating a noise component cancellation signal based on an output signal from said noise detection microphone, and an electroacoustic transducer arranged in said noise insulation cover to reproduce a noise component cancellation sound based on an output signal from said noise component cancellation circuit, wherein in addition to a voice uttered by the user, the noise component cancellation sound from said electroacoustic transducer is supplied to said transmission microphone so that an external noise component which reaches the transmission microphone through said noise insulation cover may be cancelled by said noise component cancellation sound.