环境声音信号分析  

The Analysis of the Environment Sound

作　　者：潘燕[1] 梁文革[2] 孙文红[1] 李新[1] 戚焰[1] 邵庆余[1] 

机构地区：[1]山东大学医学院生物医学工程研究所,山东济南250012 [2]山东大学计算机学院,山东济南250012

出　　处：《中国医学物理学杂志》2004年第3期161-164,共4页Chinese Journal of Medical Physics

基　　金：国家自然科学基金资助项目(39170833)

摘　　要：利用FFT分析方法,对环境中存在的267种9大类声音信号进行了分析并对其频谱分析参数进行了统计处理,了解其基频与最大谐波频率分布的特点。对基频频率较低的信号进行小波变换处理后,其三维图均发生了明显的变化,低频段变化被明显放大,可以更加清楚地表现信号低频部分的变化,有利于较低频段信息的更精确提取。Using the method of FFT, we analyzed 9 categories of environmental sound signals (altogether 267 kinds) around us. Statistic at treatment about the parameters of spectrographic analysis is used to find out the distribution characteristic of the fundamental frequency and the max harmonic frequency. After the signals of low fundamental frequency processed by wavelet transform, we found that the 3-D sonogram changed obviously, and the segment of low frequency signals magnified significantly. The changes of low frequency signals facilitate the detection of it.

关 键 词：环境声音信号 FFT 小波变换 三维声图 

分 类 号：R318.04[医药卫生—生物医学工程]