采用奇异谱主分量分析方法从病理心音信号中提取杂音成对四种常见的病理心音信号进行奇异谱分析，得到各主分量和经验正交函数，选择合适阶次重构正常心音成分和杂音成分。分。-The principal component analysis singular spectrum extracted from the pathological heart sound signals murmur pairs four common pathological heart sound signals Singula