一种用于数字助听器的WOLA滤波器组的设计准则  

A kind of design criterion for WOLA filterbanks used in digital hearing aids

作　　者：崔杰[1,2] 肖灵[1] 王玥[1] 孟晓辉[1] 刘亭亭[1] 

机构地区：[1]中国科学院声学研究所医用声学实验室,北京100190 [2]中国科学院研究生院,北京100190

出　　处：《应用声学》2010年第1期36-42,共7页Journal of Applied Acoustics

摘　　要：针对WOLA(weighted overlap-add)滤波器组在数字助听器多通道处理中的应用,本文提出了一个满足该领域要求的具体的设计准则。根据这一准则,可用窗函数法进行滤波器设计,并把问题简化为对窗长度的选取。对线性扫频信号和语音信号多通道放大两种情况进行了仿真,结果表明,适当选取窗长度,滤波器组输出信号将符合要求并且无混迭。A kind of design criterion for WOLA filterbanks used in multi-channel processing of digital hearing aids is presented. According to the new design criterion, the filter can be designed by window function, and the design can be simplified to the choice of windows lengths. Simulations of the two cases of amplification in multi-channel of linear chirp signal and speech signal are carried out. The results validate that the output signals of the designed filterbanks achieve the processing aim and have no aliasing.

关 键 词：WOLA滤波器组 设计准则 助听器 多通道 

分 类 号：TN713[电子电信—电路与系统] TH785.1[机械工程—仪器科学与技术]