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sci.reverb-decay-rt60-room Calculator
Calculates room reverberation time RT60 (time for sound to decay 60 dB) using measured impulse response or Sabine/Eyring formula. Speech intelligibility requires RT60 < 0.6 s; concert hall music optimises at 1.8–2.2 s — these conflicting requirements explain why opera houses and concert halls differ in design.
Inputs
Room Volume M3
Three-dimensional space occupied (m³ or L). 1 m³ = 1,000 L.
Total Absorption M2
Reference formula or conversion factor shown for context.
Air Absorption Pct Per M
Reference formula or conversion factor shown for context.
Results
RT60 Sabine (seconds)
Sample size or count used in the calculation.
mean free path (m)
Arithmetic average — sum divided by count. Simple and familiar, but pulled by outliers. If your data contains extreme values, the median may be more representative.
absorption area
The computed two-dimensional surface area.
RT60 = 0.161V/A
Reference formula or conversion factor shown for context.