reverberationtime
Reverberation time, denoted T60, is the time required for the sound pressure level in a space to decay by 60 decibels after the sound source has stopped. It is a key measure of how reverberant or “live” a room sounds and depends on room geometry, surface materials, occupancy, and air properties. In practice, RT60 varies with frequency, and is often specified for octave or fractional-octave bands.
In the Sabine model for a diffuse sound field, T60 is approximately 0.161 times the room volume
Measurement typically uses an impulse or a swept sine/MLS signal to generate an impulse response. The decay
Typical RT60 values vary widely by space type and frequency. Small rooms may be around 0.3–0.6 s,