中文摘要：

提出了一种改进传统听诊器功能的可行方案.首先,采用Matlab来处理心音数据（由蒙特利尔研究院提供）,包括数字滤波、陷波和频谱分析.然后,根据心音的特点（振幅小和波段宽）,设计心音传感器、放大和滤波电路.最终,研制了一款电子心音听诊器,既能实时播放心音,又能在LCD上同步显示心音波形,同时也能存储与回放心音信号.

英文摘要：

A feasible method to improve the function of traditional stethoscope was proposed. Matlab was employed to process the heart sound data（ supplied by Montreal Research Institute）,including digital filtering,notch filter and spectrum analysis. Thereafter,a heart sound sensor for capturing the heart sound signals and amplifying and filtering circuit were made by taking the characteristics of heart sounds（ small amplitudes and wide bands） into consideration.Finally,an electronic heart sounds stethoscope was developed which can not only play the heart sound signals and display them on a LCD synchronously but also storage and playback the signals.