Articles tagged “acoustic calculation”
7 articles covering acoustic calculation in acoustic engineering and building design.
Free Absorption Calculation Spreadsheet — Sabine + Eyring RT60 (Excel)
Download a free RT60 calculation spreadsheet using both Sabine and Eyring equations. Includes octave-band columns, material library, worked example, and instant compliance check.
Sabine vs Eyring Equation — When Sabine Fails Above α 0.4 | Free Calculator | AcousPlan
Sabine's equation overestimates RT60 by 47% when average absorption exceeds 0.4. Full error table and decision tree for choosing the right formula.
Sabine vs Eyring: Same Room, Different Answers — Worked Comparison
Calculate RT60 with both Sabine and Eyring equations for the same recording studio. See exactly where the results diverge, why, and when the 28% difference matters for design decisions.
AcousPlan vs Excel Spreadsheets: Why 70% of Acoustic Calculations Still Use Excel
Why acoustic consultants still use Excel for RT60 calculations — and when purpose-built software like AcousPlan changes the equation. Honest comparison of both approaches.
Why Sabine's Formula Gives Wrong Results in Open Plan Offices
Sabine's formula assumes a perfectly diffuse sound field — uniform energy density throughout the room. Open plan offices violate this assumption completely. Here is why standard RT60 calculation fails for open offices and what ISO 3382-1 Annex A recommends instead.
Sabine vs Eyring: When to Use Each RT60 Formula and How Big the Error Can Be
Sabine overestimates RT60 by 15-40% in rooms with high absorption. Eyring corrects this but breaks down in rooms with very non-uniform absorption. Here is a worked comparison for 5 room types showing exactly when each formula is appropriate and the magnitude of the error when you choose wrong.
Your RT60 Calculation Is Probably Wrong — And Sabine's Formula Is Why
Sabine's equation overestimates reverberation time by 15–40% in rooms with average absorption above 20%. Here is the Eyring correction, why it matters, and a worked example showing how large the error is in a treated meeting room.