基于听觉特性优化的级联型均衡滤波器设计

Design of Cascaded Equalization Filter Based on Auditory Characteristics Optimization

受扬声器品质、房间反射等因素的影响,声音信号会出现失真。为了改善声重放效果,使用均衡滤波器对扬声器的频率响应进行均衡。考虑到人耳听觉特性和滤波器参数估计,提出了对数尺度上系统频率响应与目标频率响应之差的代价函数,设计了由若干个Regalia-Mitra滤波器级联而成的均衡滤波器,并将其应用于小房间的音箱频率响应均衡。结果表明,设计的均衡滤波器能较好地减少扬声器频率响应与目标频率响应的差异。

Affected by factors such as speaker quality and room reflection,the sound signal will be distorted.In order to improve the sound reproduction effect,an equalization filter is used to equalize the frequency response of the speaker.Considering the auditory characteristics of human ears and the estimation of filter parameters,the cost function of the difference between the system frequency response and the target frequency response on the logarithmic scale is proposed,and an equalization filter composed of several Regalia-Mitra filters is designed and applied to the frequency response equalization of speakers in small rooms.The results show that the designed equalization filter can reduce the difference between the speaker frequency response and the target frequency response.