• SOUND: Vibrations that travel through the air and can be heard when they reach a person's or animal's ear.

• SOUND DESIGN: The process of specifying, acquiring, manipulating or generating audio.

• AMBIENT SOUND: background sounds which are present in a scene or location.

• AUDIO: The recording of sound such as in a video for the purpose of conveying information.

• DIALOGUE: An on-screen conversation between two or more people.

• VOICEOVER: A piece of narration in a movie or broadcast, spoken by an off-screen narrator.

• SOUND EFFECTS: Any sound artificially reproduced to create an effect such as the sound of a storm or a creaking door to heighten the sense of reality.

• PRODUCTION SOUND: Audio, including dialogue and noises recorded along with the video on the set of a production.

• SWEETENED SOUND: Audio that has been processed in postproduction to improve quality.

• FOLEY: A sound effects track recorded in a studio while the video is being displayed to synchronize the sounds.

• LIBRARY SOUND: Sound effects and music tracks that are from a library of sounds such as waves, wind, explosions.

• SYNTHESIZED SOUND: Digital audio sound or music, created on a computer instead of being recorded acoustically (with a mic).

• PRESENCE: Background sound or "room tone", recorded at a shooting location used to fill gaps in the production sound.

• DIALOGUE REPLACEMENT: A process by which actors re-record dialogue in a studio, synchronizing it to the lip movements of performers on screen.

• DIEGETIC SOUND: Sound comes from a source within the scene.

• NON-DIEGETIC SOUND: Sound that is added to the soundtrack to heighten impact or create an emotional response.

• IMMERSION: A perception of being present in a non-physical world.
  

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