Reverberation Time Calculator
Calculate the reverberation time of a room using the Sabine equation: RT60 = 0.161 * V / A, where V is volume and A is total absorption.
Reverberation Time (RT60)
1.6100 s
Reverberation Time (RT60) vs Room Volume
Formule
## Sabine Reverberation Time RT60 is the time for sound to decay by 60 dB after the source stops. ### Formula **RT60 = 0.161 V / A** - *V* = room volume (m3) - *A* = total absorption (sum of surface area times absorption coefficient for each surface, in m2 Sabine) - 0.161 = constant derived from the speed of sound and the 60 dB decay requirement Concert halls typically aim for 1.5 to 2.0 s; recording studios 0.3 to 0.5 s.
Exemple Résolu
Room: 500 m3, total absorption = 50 m2 Sabine.
- 01RT60 = 0.161 * V / A
- 02RT60 = 0.161 * 500 / 50
- 03RT60 = 80.5 / 50
- 04RT60 = 1.61 s
Questions Fréquentes
What is a Sabine?
One metric Sabine is equivalent to one square metre of perfectly absorbing surface. It is named after Wallace Clement Sabine, the founder of architectural acoustics.
What is the ideal reverberation time?
It depends on the use. Speech intelligibility requires short RT60 (under 0.8 s). Orchestral music benefits from 1.6 to 2.2 s. Churches may have 4+ seconds.
How do I calculate total absorption?
Sum the products of each surface area times its absorption coefficient: A = sum(S_i * alpha_i). Carpet has alpha about 0.3-0.5; bare concrete about 0.02.
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