distortion
alteration of the original shape (or other characteristic) of a signal
wow
in recording, a slow form of flutter
optical aberration
departure of the performance of an optical system from the predictions of paraxial optics
clipping
waveform distortion
cognitive distortion
exaggerated or irrational thought pattern involved in the onset and perpetuation of psychopathological states
flutter
in electronics and communication, the rapid variation of signal parameters
perspective distortion
Transformation of an object and its surrounding area that differs from its normal focal length
wow and flutter
waver in a reproduced tone that is caused by irregularities in turntable or tape drive speed during recording, duplication, or reproduction