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Flutter
Image: density variation caused by irregular frame exposures or uneven printer speed.Audio: Rapid fluctuation in frequency caused by vibration in film or tape transport. 1 It is a distortion that occurs in sound reproduction as a result of undesired speed variations during recording or reproducing. Flutter occurring at frequencies below approximately 6 Hz is termed wow.
References
1 Case, D., 1985, Motion Picture Film Processing, Media Manuals, Focal Press.
The National Film and Sound Archive of Australia acknowledges Australia’s Aboriginal and Torres Strait Islander peoples as the Traditional Custodians of the land on which we work and live and gives respect to their Elders both past and present.