摘要： 提出一种用于正常噪声环境下的心音源定位方法。利用3个传感器同步记录胸前3个位置的心音信号，对自动识别出的心音成分采用互相关法，估计同一心音源发出的信号到达2个传感器的时间延迟。利用时间延迟和传感器坐标确定心音源在传感器连线上的投影点坐标，由投影点与心音源的关系定位心音源。实验结果显示，对于采集到的健康人心音信号，利用该方法可以定位第一心音源。

关键词: 心音, 定位, 互相关, 时间延迟估计

Abstract: A heart sound localization method is proposed for heart sounds recorded from subjects in normal noise environment. Heart sounds are recorded from three separate locations on the human chest simultaneously using three sensors. The time delay differences between each two sensors are estimated by correlation calculation. They are used to calculate the coordinates of the source projection points on connections between each two sensors with respect to the coordinates of sensors. The source of the heart sound is located according to the relation of the source and its projection point. Experimental results show that the method is useful to locate the source of the first heart sound recorded from healthy subjects.

Key words: heart sound, localization, correlation, time delay estimation

中图分类号: 

• TN911.7