the.com/foley

means The craft of creating and recording everyday sound effects—footsteps, rustling cloth, breaking glass—in post-production to make a film or show sound real.

from Named after Jack Foley, a sound artist at Universal Studios who pioneered the technique in the early days of sound film, physically performing noises in sync with picture (walking on gravel in a box, crunching cabbage for punches) because raw location audio was often too thin or useless. His name became the generic term, the way some inventors' names turn into the everyday word for the thing they made.