Definitions for "Absorption coefficient"
A measure of the extinction due to absorption of monochromatic radiation as it traverses a medium. Usually expressed as a volume absorption coefficient, , with units of reciprocal length (i.e., area per unit volume), but also as a mass absorption coefficient, , with units of area per unit mass. The two are related by , where ρ is the density of the absorber. See also absorption optical thickness.
A measure of the amount of radiant energy, incident normal to a planar surface, that is absorbed per unit distance or unit mass of a substance.
A rating of a material that tells how much sound energy it absorbs at given frequencies. Measured in Sabines. see also Sabine