Invention Grant
US08416978B2 Vibration pickup microphone 有权
振动拾音麦克风

Vibration pickup microphone
Abstract:
[Problem to be Solved] To provide a high-sensitive compact vibration pickup microphone, suitably used as a talking microphone in high ambient noise environments or as a speech recognition input microphone, with high microphone sensitivity, resistance to sliding noise, and insensitivity to external noise and vibration.[Solution] A vibration pickup microphone comprising a housing 1 provided with a first space 5 and a second space 6, an external diaphragm 2 disposed over the first space 5, and a microphone unit 3 that is contained in a rear end portion of the second space having an air gap 8 maintained 6, wherein by disposing the external diaphragm 2 over it, an air chamber 7 formed in the first space 5 and an air gap 8 formed in the second space 6 are communicated via a thin passageway 4, so that vibration of voice picked up by the external diaphragm 2 is transmitted to the microphone unit 3 as sound waves, and then frequency components higher than voice frequencies within frequency components of the sound waves are attenuated in its transmitting path.
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