Phase distortion

{{Short description|Nonlinear phase response to filters}} {{for|the method of sound synthesis|Phase distortion synthesis}} {{Use American English|date = March 2019}}

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== 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.<ref>{{cite web |author1=Arthur C Ludwig Sr. |title=Audibility of Phase Distortion |url=http://www.silcom.com/~aludwig/Phase_audibility.htm |access-date=15 February 2016 |date=1997}}</ref><ref>{{cite journal |author1=Lipshitz, Stanley P. |author2=Pocock, Mark |author3=Vanderkooy, John |title=On the Audibility of Midrange Phase Distortion in Audio Systems |journal=Journal of the Audio Engineering Society |date=1 September 1982 |volume=30 |issue=9 |pages=580–595 |url=http://www.aes.org/e-lib/browse.cfm?elib=3824}}</ref><ref>{{cite web |title=Human Hearing - Phase Distortion Audibility |url=http://www.audioholics.com/room-acoustics/human-hearing-phase-distortion-audibility-part-2}}</ref>

==See also== *Audio system measurements *Phase noise

==References== {{Reflist}} {{refbegin}} {{FS1037C MS188}} {{refend}}

Category:Electrical parameters Category:Audio amplifier specifications