驻极体传声器
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an electret microphone
驻极体麦克风
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It also gives a safety design problem analysis using an electret capacitor microphone to pick-up the heart sound signals.
该电路涉及到放大、滤波、电平抬升等电路，并给出了安全设计问题，利用驻极体电容传声器来拾取心音信号。
youdao
Lucent researchers replaced it with an electret microphone, which picks up sound using a polymer foil more than 1, 000 times smaller than the diaphragm in a dynamic microphone that picks up fewer vibrations.
FORBES: Racecar Drivers To Use Bell Labs Microphone
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