Design of heart sound processing analog circuit based on the electret capacitor microphone 基于驻极体电容传声器的心音模拟处理电路的设计
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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。
