Which term refers to a gradual decrease in the level of light or sound?

The term that refers to a gradual decrease in the level of light or sound is "fade out." In the context of theatre and performance, a fade out is commonly used to create a smooth transition, where the intensity of light diminishes or the volume of sound decreases over time, effectively drawing the audience’s attention or signaling the conclusion of a scene or moment. This technique is often employed in stage lighting to enhance mood and pacing, and in sound design to create a sense of closure or a shift in focus.

The other terms represent different concepts; for example, a crescendo is the opposite of a fade out, as it indicates a gradual increase in volume. Dissonance describes a lack of harmony among musical notes, and clipping refers to distortion that occurs when audio levels exceed the maximum limit, resulting in a harsh sound. Understanding these variations in terminology helps clarify their distinct uses and applications in theatre arts.