Understanding Piezoelectric effect!
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压电效应是电子听诊器将声波转换为电信号的关键。压电材料在外部压力下能产生电压,特别是二氧化硅(石英晶体)具有这种特性。当施加压力时,材料内部的正负电荷中心发生分离,形成极化,从而产生电场和电压。电子听诊器的薄膜与压电材料连接,声波使薄膜振动,导致压电材料产生与偏转量成比例的电压。这些电压信号经过放大和过滤电路处理,最终得到所需的输出。
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