三种时频表示方法在心音信号分析中的研究应用  

A study of using three time-frequency methods in the analysis of heart sound signals

作　　者：吴延军[1] 徐泾平[1] 赵艳[1] 王静[1] 程敬之[1] 

机构地区：[1]西安交通大学

出　　处：《中国医疗器械杂志》1996年第1期11-17,共7页Chinese Journal of Medical Instrumentation

摘　　要：本文比较研究了短时傅里叶变换和连续小波变换以及ＡＲ谱谱阵在心音信号时－频分析方面的性能差异，指出了应用这三种方法应该注意的问题，并对正常的第二心音信号的时频分析进行了研究。结果表明，连续小波变换在反映信号的时频特性方面（谱峰值、谱峰的位置、谱的分布）具有比另外两种方法高的性能。The differences in the performance of the short Fourier Transform,continuous wavelet transform and AR-spectrum array in time-frequency analysis of heart sound signals are studied and com pared in this paper,Some problems in using these methods are discussed.We have used these methods for the analysis of heart sound signals.It is concluded that CWT has the highest performance in the time-frequency analysis among these three methods.

关 键 词：心音信号 信号分析 时频分析 

分 类 号：TH772[机械工程—仪器科学与技术]