Editing 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 (waves)|phase shift]] introduced by a [[electrical network|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}}

{{Noise}}

[[Category:Electrical parameters]]
[[Category:Audio amplifier specifications]]


{{physics-stub}}
{{Sound-tech-stub}}