Media Techniques - Sound

Sound:
Diegetic Sound: Sound whose source is visible on the screen or whose source is implied to be present by the action of the film
Non-deigetic Sound: Sound whose source is neither visible on the screen nor has been implied to be present in the action
Synchronous Sound: Synchronous sound can be either ambient or a sound effect   
Asynchronous Sound:Sound which is indigenous to the action but not precisely synchronized with the action. 
Sound Motif:  A sound effect or combination of sound effects that are associated with a particular character, setting, situation or idea through the film.     
Sound Bridge: one of the most common transitions in the continuity editing style, one that stresses the connection between both scenes since their mood (suggested by the music) is still the same
Score:  orchestrate or arrange (a piece of music), typically for a specified instrument or instruments.
Incidental Music: music used in a film or play as a background to create or enhance a particular atmosphere.
Ambient Sound: means the background sounds which are present in a scene or location. Common ambient sounds include wind, water, birds, crowds, office noises, traffic, etc.