Sabine Absorption

Sabine absorption refers to the total equivalent absorption area in a room expressed in sabins (imperial: ft²) or metric sabins (m²). Named after Wallace Clement Sabine, one sabin represents the absorption equivalent of one square foot (or one square metre in the metric system) of perfectly absorptive surface. Total Sabine absorption is the sum of all surface, object, and air absorption contributions in the room. It is the fundamental quantity in the Sabine reverberation time equation. In practice, "adding Sabine absorption" means installing acoustic materials that increase the total A value, thereby reducing reverberation time. The term is commonly used in North American acoustic practice while European practice typically refers to "absorption area in m²." Sabine absorption values for common objects and materials are published in acoustic handbooks, product data sheets, and standards references.