Foley
The reproduction of everyday sound effects that are added to films in post-production.
In depth
Named after Jack Foley, this process involves artists watching the film and physically making sounds (footsteps, cloth movement, breaking glass) in sync with the picture to replace or enhance the on-set audio.
Example
“The sound of crunchy footsteps on snow in 'Frozen' was actually a Foley artist squeezing bags of cornstarch.”
Origin and history
Jack Foley joined Universal Studios in 1914 as a stuntman and director, but became famous for inventing the live sound-recording technique that bears his name. As film transitioned from silent to synchronized sound in the late 1920s, Foley pioneered the practice of recording effects against picture in real time on a Foley stage. The discipline he created remains essentially unchanged today — contemporary Foley artists still wear costumes and walk on different surfaces in pits filled with sand, gravel, tile, and concrete.
Why filmmakers use it
On-set production audio captures dialogue cleanly but rarely records the small sounds that make a scene feel inhabited. Foley fills that gap: clothing rustles, keys jingle, a coffee cup is set on a desk. Without it, films feel sterile and television-like. The best Foley work is invisible — audiences should never consciously notice it, but they would immediately feel its absence.
More examples in cinema
- The lightsabers in 'Star Wars' begin with synthesizer tones but are completed on a Foley stage with movement artists swinging the props through air.
- The bone-crunching impacts of fight scenes in 'John Wick' are largely Foley work performed against the locked picture.
Common confusion
Foley is not the same as 'sound design.' Sound design covers the entire audio palette including music, ambience, and effects; Foley is specifically the performance and recording of synchronized everyday sounds.