Calculation methodology

Reverberation estimates use Sabine and Eyring models, modes use the rectangular-room solution and transition frequency uses the Schroeder approximation. Material coefficients are typical values and do not replace laboratory data for a specific product.

Equations

• Sabine: T = 0.161 V / A
• Eyring: T = -0.161 V / [S ln(1-ᾱ)]
• Modes: f = c/2 · √[(nx/L)² + (ny/W)² + (nz/H)²]
• Schroeder: fs ≈ 2000 √(T/V)

Reference standards and sources

ISO 3382-2 (measurement of reverberation time in ordinary rooms), ISO 354 (reverberation-room absorption measurement), C. F. Eyring, “Reverberation Time in Dead Rooms”, JASA 1930; M. R. Schroeder, room-acoustic transition-frequency work.

Limitations and responsibility

The service provides educational and early-stage planning estimates. The user is responsible for safe installation and compliance with product instructions and regulations.