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Measurement of Phase and Group Delay Distortion of Audio System

Pan Lichao  
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.
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