The document discusses the relationship between sound and image in films. It explains that sound and image can be recorded separately, allowing filmmakers to manipulate sound elements like dialogue, music, and effects. It also describes five ways sound can differ from the image: through onscreen/offscreen space, objective/subjective perspectives, diegetic/non-diegetic sources, differences in image and sound timing, and contrasts in image and sound moods. These techniques help filmmakers shape viewers' perceptions and extend the world of the film beyond the frame.