Sound in film is a powerful storytelling tool that shapes audience perception and emotional response. Diegetic sound originates from within the film's world, while non-diegetic sound comes from outside the narrative space. This distinction is crucial for understanding how filmmakers craft immersive experiences. The interplay between diegetic and non-diegetic sound creates layers of meaning and atmosphere. Dialogue, ambient noise, and on-screen music contribute to realism, while score, narration, and added effects guide emotional interpretation. Filmmakers manipulate these elements to enhance narrative impact and audience engagement.