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US 2012/0259629 A1Published application
Noise reduction communication device
AssigneeKabushiki Kaisha Audio-Technica
InventorHiroshi AKINO
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AssigneeKabushiki Kaisha Audio-Technica
InventorHiroshi AKINO
Estimating the term…
To provide a noise reduction transmitter which can secure clarity of sounds collected in very noisy environments and maintain a quality of sounds without devising a noise insulation cover particularly. A transmission microphone 7 is arranged inside a noise insulation cover 2 worn on and covering at least a user's 1 mouth. A noise detection microphone 9 which detects external noises is arranged outside the noise insulation cover, and a noise component cancellation circuit 11 is provided which generates a noise component cancellation signal based on an output signal from the noise detection microphone. An electroacoustic transducer 8 is arranged in the noise insulation cover to reproduce a noise component cancellation sound based on an output signal from the noise component cancellation circuit 11.
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.
Dependencies are inferred from the claim text.