蝙蝠回声定位叫声的连续小波时频分析  

Time-frequency analysis of echolocation call of bat based on continuous wavelet transform

作　　者：王双维[1] 秦琴[1] 冯江[2] 陈敏[2] 刘颖[2] 

机构地区：[1]东北师范大学物理学院,吉林长春130024 [2]东北师范大学城市与环境科学学院,吉林长春130024

出　　处：《东北师大学报（自然科学版）》2005年第2期45-49,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(30370261);教育部新世纪优秀人才支持计划项目(NCET-04-0309);教育部重点项目(104257);吉林省杰出青年基金资助项目(20030114)

摘　　要：　连续小波变换用于分析蝙蝠回声定位叫声,通过对小波尺度的适当选取,解决了传统语谱分析的分辨率固定、计算量大、信息冗余量大的缺点.MATLAB仿真证明,小波变换分析结果并未丢失原有信息,是分析蝙蝠回声定位叫声的一种有效新途径.<Abstrcat>This paper applies continuous wavelet transform (CWT) to the analysis of echolocation calls of several bats. Taking advantage of retractility and time-delay characteristics of wavelet, this paper solves the problems of fixed resolving power and large redundance of the information caused by traditional sonogram analysis by choosing the scale of wavelet correctly. The computations of the signals were made on a computer in a MATLAB environment. CWT is testified to be a new effective way in analyzing the echolocation signals of bats.

关 键 词：小波 连续小波变换 蝙蝠回声定位叫声 

分 类 号：O432[机械工程—光学工程] X171.1[理学—光学]