The loudness-intensity relationship is named Stevens’ power law.

Evidence

Today, we refer to the relationship between loudness and stimulus intensity as Stevens’ power law, which follows the following equation: where L is the perceived loudness and I is the physical intensity. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 722

Categorization

• DEFINE: Names and defines Stevens’ power law, the central model of this chapter.