Definition:
Most of the physical sounds in a finished film were not recorded on set. They were created afterwards by Foley artists: specialists who watch the film back in a studio and perform sound effects in sync with the picture, recreating footsteps, clothing movement, object handling, and any other specific physical sound the location recording did not capture cleanly.
What It Means in Movies:
Foley gives a film its physical reality. The sound of a character walking across a marble floor is different from the same character walking on gravel. That distinction is created by a Foley artist in a studio, wearing different shoes, walking on different surfaces, watching the picture on a screen in front of them. When it is done well, the audience never thinks about sound at all.
Why It Matters:
Without Foley, films feel hollow. Performances float on an ambient bed without the specific physical detail that makes a world credible. The creak of a leather jacket. The weight of footsteps on a particular surface. The sound of hands on a table. None of these survive post-production without Foley.
Example:
In a chase sequence, a Foley artist recreates the precise sounds of a character running across a rooftop: the rhythm of the footfalls, the weight of the body, the surface texture of the roof. The original location audio has too much wind and ambient noise. The Foley session replaces it with something cleaner and more physically present.