The room constant R is the reciprocal of the absorption-to-surface term

Evidence

The term (1 − α)/Sα in Equation 6.6 is often inverted to give a quantity known as the room constant, R, which is given by: and α = the average absorption coefficient in the room Using the room constant, Equation 6. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1768

Categorization

• DEFINE: Names and defines the room constant, a core quantity in room acoustics.