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。
The clinical experiments have indicated that the first and second heart sound can be almost acquired by the microphone, but it is difficult for the third and fourth, w…
临床实验表明，利用驻极体传声器基本上能采集到正常的第一、第二心音，但对有病理信息的第三、第四心音却不易正确采集到，这与患者性别和胖、瘦等因素均有关系。
The clinical experiments have indicated that the first and second heart sound can be almost acquired by the microphone, but it is difficult for the third and fourth, w…
临床实验表明，利用驻极体传声器基本上能采集到正常的第一、第二心音，但对有病理信息的第三、第四心音却不易正确采集到，这与患者性别和胖、瘦等因素均有关系。
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