Diegetic Sound Sound whose source is visible on the screen or whose source is implied to be present by the action of the film: voices of characters sounds made by objects in the story music represented as coming from instruments in the story space Diegetic sound is any sound presented as originated from source within the film's world Diegetic sound can be either on screen or off screen depending on whatever its source is within the frame or outside the frame.
Non-Diegetic Sound Sound whose source is neither visible on the screen nor has been implied to be present in the action: narrator's commentary sound effects which is added for the dramatic effect mood music Non-diegetic sound is represented as coming from the a source outside story space.
Synchronous/Asynchronous Sound Sound that fits in/does not fit in with the pace or the beat of the action taking place on the screen eg : Music that corresponds with the clashing of swords or Speech that is in time with lip movement or dubbed
Parallel/Contrapuntal S ound Sound that fits the mood of a scene/is in contrast to the scene eg : Fast paced music during a police chase Sadistic music during a murder Some inspective music during a crime scene The who playing when Heratio from CSI tells a pun
Ambient sound In filmmaking, ambience consists of the sounds of a given location or space. It is the opposite of "silence." This term is often confused with presence. Every location had distinct and subtle sounds created by its environment. These sound sources can include wildlife, wind, music, rain, running water, thunder, rustling leaves, distant traffic, aircraft and machinery noise, the sound of distant human movement and speech, creaks from thermal contraction, air conditioning and plumbing noises, fan and motor noises, and harmonics of mains power.
Sound Bridge The bridge is built for continuity -- the sound from one scene is carried into the adjoining scene, or example: A boy sits in a park, watching his dog play in the autumn leaves, and the sound heard is that of a doorbell ringing. The front door is visible in the next scene.