Calculadora de Tempo de Reverberação
Calcule o tempo de reverberação (RT60) de uma sala usando a fórmula de Sabine. Projete a acústica ideal para salas e auditórios.
Reverberation Time (RT60)
1.6100 s
Reverberation Time (RT60) vs Room Volume
Formula
Sabine Reverberation Time
RT60 is the time for sound to decay by 60 dB after the source stops.
Formula
RT60 = 0.161 V / A
Concert halls typically aim for 1.5 to 2.0 s; recording studios 0.3 to 0.5 s.
Exemplo Resolvido
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
Perguntas Frequentes
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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