逆滤波算法的扬声器系统均衡研究  

The Study of the Invert Filters of Loudspeakers Equalization

作　　者：蔡阳生[1] 张承云[1] 

机构地区：[1]广州大学机械与电气工程学院,广州510006

出　　处：《科学技术与工程》2013年第19期5586-5589,共4页Science Technology and Engineering

基　　金：广东省工业攻关项目(2008B011400001);珠江科技新星专项(2011J2200015)资助

摘　　要：扬声器系统的脉冲响应可以分解为一个最小相位系统和一个全通系统。根据最小相位系统的性质,可对扬声器系统的最小相位系统部分进行逆滤波以达到音质均衡的目的。通过该算法对两款扬声器系统进行音质均衡的实验。采用不同信号长度的逆滤波,对比其均衡结果,并对扬声器系统的逆脉冲响应进行分析。最后总结出在对扬声系统进行逆滤波时,其逆滤波长度不必太长,可适当缩短以减少硬件成本;但其长度必须要能包含逆脉冲响应的所有非零信号,否则会出现失真。The impulse response of the loudspeakers can be decomposed into a minimum phase system and a all-pass system. Based on the character of the minimum phase system, the equalization of the loudspeakers can he achieved by the invert filters for the minimum phase part of loudspeakers. Compared with the results of the different length of the invert filters, and analysised the inverted impulse response, the conclusions have been drawn that the length of the invert filters can be shorten suitability to reduce the hardware cost, but it must be contain the all non- zero signals of the invert filters, otherwise there would be distortion.

关 键 词：扬声器系统 最小相位系统 逆滤波 

分 类 号：TB529[理学—物理]