阐述了心音信号的产生机理、组成成分以及人体微弱心音信号检测的关键技术, 介绍了心 音信号处理技术在心血管疾病无创诊断中的意义。-Described the mechanism of the heart sound signal, the composition as well as weak human heart sound signal detection technology, introduced invasive diagnosis of heart sound signal pr