Reverberation is the persistence of sound in an enclosed space after the sound's source has stopped. The estimation of a room's reverberation time (RT60) is a fundamental calculation in acoustics to determine perceived liveliness. Both the Sabine and Eyring equations are traditional models and assume the absorptive surfaces are evenly distributed across all walls, floor, and ceiling. The Fitzroy model accounts for uneven distribution across adjacent surfaces.

Enter the room dimensions in the fields below and enter a RT goal at right. The Suggested RT By Application tab can help determine an appropriate value based on your room's geometric volume. Enter all room surfaces and audience areas in the sections below. Select absorptive surfaces until the RT graph satisfies the RT goal. Once all present surfaces are entered, use the Suggested Finishes tab to select finishes that are absorptive at frequencies where the RT goal remains exceeded.