Phase distortion

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In signal processing, phase distortion or phase-frequency distortion is distortion, that is, change in the shape of the waveform, that occurs when (a) a filter's phase response is not linear over the frequency range of interest, that is, the phase shift introduced by a circuit or device is not directly proportional to frequency, or (b) the zero-frequency intercept of the phase-frequency characteristic is not 0 or an integral multiple of 2π radians.

Audibility of phase distortion[edit]

Grossly changed phase relationships, without changing amplitudes, can be audible but the degree of audibility of the type of phase shifts expected from typical sound systems remains debated.[1][2][3]

See also[edit]


  1. ^ Arthur C Ludwig Sr. (1997). "Audibility of Phase Distortion". Retrieved 15 February 2016.
  2. ^ Lipshitz, Stanley P.; Pocock, Mark; Vanderkooy, John (1 September 1982). "On the Audibility of Midrange Phase Distortion in Audio Systems". Journal of the Audio Engineering Society. 30 (9): 580–595.
  3. ^ "Human Hearing - Phase Distortion Audibility".

Public Domain This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22. (in support of MIL-STD-188).