Parameters
Presets
Room Dimensions
Length L
10.0 m
Width W
8.0 m
Height H
3.0 m
Surface Materials
Floor
Ceiling
Walls ×4
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RT60 500Hz Sabine [s]
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RT60 500Hz Eyring [s]
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Total absorption A [m²]
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Room volume V [m³]
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Critical distance rc [m]
Theory
Sabine formula:
$$T_{60} = \frac{0.161 V}{A}, \quad A = \sum S_i \alpha_i$$Eyring formula:
$$T_{60} = \frac{-0.161 V}{S \ln(1-\bar\alpha)}, \quad \bar\alpha = \frac{A}{S}$$Critical distance: $r_c = \sqrt{A / (16\pi)}$
V: room volume [m³], S: total surface area [m²], A: total absorption [m² sabin]
Design guidelines: Concert hall 1.5–2.5 s · Classroom 0.4–0.8 s · Recording studio 0.2–0.5 s · Open office 0.3–0.6 s. When comparing with ISO 3382 measurements, use frequency-dependent absorption data from certified test reports.