This blog post explores how sound in films maximizes emotion and immersion, examining how various elements—such as background music, sound effects, and silence—influence audience feelings and narrative flow.
Visual information presented in a film is carried on the image track, while auditory information is carried on the sound track. The sounds contained within the sound track are collectively referred to as film sound. Sound is a crucial element that shapes a film’s atmosphere and emotions, serving as a powerful tool to heighten immersion and deliver emotional impact to the audience. Sound exists in various types, effectively conveying the appropriate mood for each scene. It goes beyond mere background music or sound effects, contributing to the reinforcement of the film’s narrative structure and themes.
Sound is categorized into several types based on the source of the sound. Sound originating from within the frame, primarily used to heighten realism, is called on-screen sound. On-screen sound provides the audience with a sense of reality, creating the illusion of being present in the scene alongside the characters. Conversely, sound originating from off-screen to represent unseen events is called off-screen sound. Non-simultaneous sound stimulates the audience’s imagination and adds depth to the film’s narrative. Meanwhile, sounds that could not occur within the film’s reality—such as background music, which is manipulated and introduced from outside the film—are called external sound. External sound creates the film’s emotional atmosphere or emphasizes specific themes. In contrast, all sounds originating within the film’s reality are intrinsic sound. Intrinsic sound is a crucial element in constructing the film’s reality, helping the audience become more immersed in the story. These sounds are used alone or combined appropriately to match the director’s expressive intent.
Sound is often used to dramatically present a character’s thoughts or psychology. Hearing a character’s voice alongside a close-up of their face effectively conveys their inner thoughts. For instance, when a main character’s voice is used as narration, their inner world and psychological conflicts are conveyed more deeply. Another example involves amplifying only the sound of a character’s heartbeat without showing their expression, conveying their unstable state of mind. When the protagonist’s pounding heartbeat is heard directly by the audience, viewers feel as if their own hearts are racing. These psychological effects deepen the audience’s empathy with the characters and maximize the film’s tension.
Films can also intentionally remove sound. The so-called Dead Track is as effective as an intensely impactful sound. When a scene suddenly and deliberately becomes silent, the audience focuses their attention and watches the screen more intently. This draws them into the character’s situation, allowing for a deeper understanding of their psychology. This absence of sound is often used to emphasize dramatic turning points or significant events, effectively eliciting an emotional response from the audience.
Sound also acts as an adhesive, naturally connecting scenes. By sustaining the sound from the preceding scene until the next scene is introduced, or by previewing the sound of the next scene from the end of the current one, the gap in time and space between scenes can be bridged. Sounds from one scene can also overlap with those of the next. For example, showing a character reaching for a clock with an alarm sound in the morning, followed by showing the same action reaching for a phone with a ringing sound in the afternoon, creates a natural transition. This continuity of sound helps connect the film’s narrative more smoothly, allowing the audience to follow the flow of the film without interruption.
If a film’s screen is someone’s face, then its sound is that person’s voice. Just as it’s difficult to fully understand someone’s inner world through expressions alone without hearing their voice, it’s hard for the audience to grasp the inner meaning contained within a screen devoid of sound. In this way, sound maintains a close relationship with a film’s scenes and plot, serving as a crucial element for expressing its themes or the director’s intent. The role sound plays in film can never be underestimated; it is a core element that determines how effectively the film’s overall message and emotional impact are conveyed.
