说明： 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 processing technology in cardiovascular disease.)
