Sound.

Diegetic Sound -
Example; 

• voices of characters 
• sounds made by objects in the story 
• music represented as coming from instruments in the story space ( = source music)

Non - Diegetic sound -
Example; 

• narrator's commentary
• sound effects which is added for the dramatic effect
• mood music

Sound Bridge - 
 Example; 

• Continuous music from one scene to another
• Music that carries one scene to another

Ambient Sound - 
Example;

• Background noise
• Sounds present at the location or the scene.

Synchronous Sound -
Example;

• Noise seen on screen
• Conversation on screen

Non-synchronous Sound -

Example;

• Things that you cant see
• Gun Shot in the dark