基于Labview2014的心音信号瞬时频率分析

摘要

Objective To analyze the heart sound signals through signal processing methodology so as to provide objective foundations for physicians to diagnose the heart-sound-related heart diseases. Methods Based on Labview2014, the instantaneous frequency of heart sound was analyzed to obtain the frequency spectrum and the curve of instantaneous frequency. Results The differences between normal and abnormal heart sound was signiifcant in the aspects of the frequency spectrum and the curve of instantaneous frequency. Conclusion This methodology had proven its accuracy in the veriifcation test in revealing differences between normal and abnormal heart sound, which contributed to convenient and efifcient diagnosis of heart-sound-related heart diseases for physicians.%目的：利用信号处理手段对心音信号进行分析，为医生诊断心音相关心脏疾病提供客观依据。方法基于Labview2014开发平台对心音进行瞬时频率分析，给出其能量图谱以及瞬时频率曲线。结果正常与异常心音的瞬时频率曲线及功率谱有明显差异。结论经试验验证，该方法能够准确描述正常与异常心音的频率差异，使医生能够便捷、高效地诊断心音相关心脏疾病。