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Diegetic Sound
Sound originating from the film's world.
Nondiegetic Sound
Sound not originating from the film's world.
Internal Diegetic Sound
Sound heard by a character only.
External Diegetic Sound
Sound that characters can hear externally.
Onscreen Sound
Sound coming from a visible source.
Offscreen Sound
Sound from a source not visible on screen.
Sound Mixing
Combining various sound elements in postproduction.
Foley Process
Creating sound effects synchronized with film.
Mickey-Mousing
Synchronizing sound with visual action closely.
Sound Perspective
Perception of sound location and distance.
Synchronous Sound
Sound that matches the timing of visuals.
Asynchronous Sound
Sound that does not match the visuals' timing.
Sound Bridge
Transitioning sound from one scene to another.
Sound Montage
Combining various sounds to create meaning.
Sound Libraries
Collections of sound effects for film use.
Rhythm in Sound
Pattern of sounds that creates pacing.