Diegetic sound- sound that characters on screen can hear (for example: characters talking to each other).
Non-diegetic sound- sound that the audience can hear and characters on screen can’t.
Non-simultaneous sound- sound that takes place earlier in the story than the current image.
Direct sound- sound that is recorded at the time of filming.
Synchronous sound- sound that is matched with the acton and movements being viewed.
Postsynchornization dubbing- describes the process of adding sound to a scene after it is filmed.
Offscreen sound- describes sound assumed to be in the space of a screen yet remains offscreen while the action takes place simultaneously.