Reverberation Time Calculator
A 1000 m³ hall whose surfaces provide 94 m² of absorption has a Sabine reverberation time of 1.71277 s.
One area per surface type: floor, ceiling, walls, seats…
1.71276595744681 s
Full answer, then cut to fewer decimals (not rounded):
- 1.71276595744681 s
- 1.7127659574468 s
- 1.712765957446 s
- 1.71276595744 s
- 1.7127659574 s
- 1.712765957 s
- 1.71276595 s
- 1.7127659 s
- 1.712765 s
- 1.71276 s
- 1.7127 s
- 1.712 s
- 1.71 s
- 1.7 s
- Total absorption A = ΣSα
- 94 m² sabins
- Mean absorption coefficient
- 0.1342857143
- Eyring T₆₀
- 1.595003075 s
Step-by-step solution
- A = ΣSα = 200 × 0.02 + 200 × 0.3 + 300 × 0.1 = 94 m²
- T = 0.161 V / A = 0.161 × 1000 ÷ 94 = 1.712765957 s
Reverberation Time Formula
T₆₀ = 0.161 V / ΣSα
Eyring: T = 0.161 V / (−S ln(1 − ᾱ))
Worked Example
A 1000 m³ hall with 200, 200 and 300 m² of surfaces at α = 0.02, 0.3 and 0.1:
- A = ΣSα = 200 × 0.02 + 200 × 0.3 + 300 × 0.1 = 94 m²
- T = 0.161 V / A = 0.161 × 1000 ÷ 94 = 1.712765957 s
Mean absorption coefficient: 0.1342857143 · Eyring T₆₀: 1.595003075 s
GATE tip
In imperial units Sabine’s constant is 0.049 (ft³, ft²); use 0.161 only with metres.
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Frequently asked questions
What reverberation time is ideal?
Speech rooms about 0.6–1.0 s; music halls 1.5–2.2 s, rising with volume.
When is Eyring better than Sabine?
For absorbent rooms (mean α above about 0.2), where Sabine overestimates the decay time.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Reverberation Time Calculator. Retrieved October 29, 2026, from https://scientificconverters.com/calculators/reverberation-time-calculator/
IEEE
Scientific Converters, "Reverberation Time Calculator," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/calculators/reverberation-time-calculator/