Over the years, the ear's ability to detect phase distortion in musical signals has been a controversial question. Research for the purpose of finding a suitable complex signal whose different frequency components could be altered in ase without altering the amplitude spectrum is reported. Subjective listening tests, using a number of listeners, have demonstrated the detectability of phase. It has also been demonstrated that the ear -prefers- the frequency content in negative-pressure transient fronts, thus raising the question of a need for polarity standardization.
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