【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。更多还原

【Abstract】 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.更多还原