A sound effect is an artificially created or enhanced sound, or sound process used to emphasize artistic or other content of films, television shows, live performance, animation, video games, music, or other media.

In filmmaking, Foley is the reproduction of everyday sound effects that are added to films, videos, and other media in post-production to enhance audio quality. Foley is named after sound-effects artist Jack Foley. Foley sounds are used to enhance the auditory experience of a movie. They can be anything from the swishing of clothing and footsteps to squeaky doors and breaking glass. Foley can also be used to cover up unwanted sounds captured on the set of a movie during filming, such as overflying airplanes or passing traffic.