1. Sound plays a crucial role in films, with 90% of the experience coming from audio rather than visuals. Sound is used to simulate reality, add elements not visible, and set mood.
2. Key audio elements include dialogue, ambient noise, additional recordings, narration, effects, score, and soundtrack music. Effects are created through Foley artistry and studios.
3. The editing and mixing process combines all audio layers to enhance realism and emotional impact for the audience.