Sound

Non-Diegetic: Sound put on top of the scene and is not in any way natural from within the scene.

Diegetic: Realistic sound that are naturally created within the scene.

Non-Diegetic

Title Music: Theme tunes.

Score/Incidental Music: Music, usually orchestral, used to create tone/tension. 

Leitmotifs/Sound Motifs: Sound associated with a certain character or event. 

Sound Effects: Used to create atmosphere. 

Voice Over: Used to give the viewer and insight into and event or a character's mind, setting the scene or progressing the narrative. 

Diegetic

Synchronous Sound: When the sour matches what you can see on the screen. 

Sound Effects: Realistic sounds that match the action on the screen, often foley. 

Dialogue: Character's speaking. 

Ambient Sound: Natural background noise that would be associated with the scene.