音响系统的相位、群延迟失真及测量

Measurement of Phase and Group Delay Distortion of Audio System

用复传递函数表示音响系统的特性除振幅响应外还有相位响应。本文从线性系统分析的角度定义了音响系统的相位和群延迟失真,并讨论了所定义的群延迟物理意义。建立了一个具有实用价值的测量系统,指出了基于脉冲测量的要点和注意事项,并给出了各种测量结果和简单分析。

The characteristics of audio system represented by a complex transfer function include not only amplitude response but also phase response. This paper defines phase and group delay distortion of audio system based on point view of linear system analysis and the physical meanings of group delay is discussed. A practical measuring system has been set up and some main points are given based on the impulse measurement. All measuring results and simple analysis are presented.