此为基于单片机的可视听诊器设计。利用C语言实现了驻极体式声音传感器实现的心音数据采集系统功能，利用图形液晶模块实现显示的新型可视电子听诊器功能。-This is based on single-chip design visual stethoscope. The use of C language realization of the electret-type sound of the heart sound sensor data acquisition system, using gra