- Diegetic sound - These are sounds which are apart of the film world, for example if someone knocks a glass over in the scene the actors and the audience can hear it.
- Non Diegetic sound - there are sounds which are not apart of the sound world and cant be heard by the characters in the scene, for example narrations and theme music are non diegetic sounds.
Another category is on-screen and off-creen sound:
- On-screen sound is sounds which you can see being made in the shot, for example you see a door get slammed shut in the shot and you can hear the slam.
- off-screen sound is sounds which you cant see being made, for example a car pulling up out side of a house.