Another word for Diegetic sound is actual sound, and another term for non-diegetic sound is commentary sound. Diegetic and non diegetic sounds are usually used for horror or comedy.
Synchronous sound and Asynchronous sound- Synchronous sounds are those sounds which are synchronized or matched with what is viewed. For example: If the film portrays a character playing the piano, the sounds of the piano are projected. Asynchronous sound effects are not matched with a visible source of the sound on screen. Such sounds are included so as to provide an appropriate emotional nuance, and they may also add to the realism of the film.
asynchronous sound-
synchronous sound-
Sound effects- a sound other than speech or music made artificially for use in a play, film, or other broadcast production. Sound effects are used in many ways such as to create suspense, and dramatic effect.
Sound motif- A sound effect or combination of sound effects that are associated with a particular character, setting, situation or idea through the film. The use of sound motifs can help shape a story that requires many characters and many locations and help unify the film and sustain its narrative and thematic development