AUDIO NON-LINEARITY:a comb-filter method for measuring distortion

摘要

A new method of measuring non-linear distortion of sound signals is described. This method uses a test-noise signal, based on a pseudo-random sequence and occupying most of the audio band, in conjunction with comb-filter techniques to measure distortion over a wide frequency range;it gives better correlation with subjective test results than the conventional total harmonic distortion method.