Calculateur d'Absorption Acoustique Gratuit
Calculez le coefficient d'absorption acoustique d'une salle. Estimez la surface d'absorption nécessaire pour votre espace.
Total Absorption
59.00 m2 Sabine
Total Absorption vs Surface 1 Area
Formule
Room Sound Absorption
Total absorption determines how quickly sound energy is removed from a room.
Formula
A = sum(S_i * alpha_i)
This value feeds into the Sabine equation for reverberation time.
Exemple Résolu
Room with concrete walls (100 m2, alpha=0.05), carpet floor (80 m2, alpha=0.3), acoustic ceiling (50 m2, alpha=0.6).
- 01A = 100*0.05 + 80*0.3 + 50*0.6
- 02A = 5 + 24 + 30 = 59 m2 Sabine
- 03Average alpha = 59 / 230 = 0.257
Questions Fréquentes
What materials have high absorption?
Open-cell foam, fiberglass panels, heavy curtains, and carpet typically have alpha above 0.5 at mid-frequencies.
Does absorption coefficient vary with frequency?
Yes, significantly. Most porous absorbers work better at higher frequencies. Bass traps are needed for low-frequency absorption.
Can alpha exceed 1?
In the Sabine model, measured alpha can slightly exceed 1 due to edge diffraction effects. This is a known limitation of the Sabine approach.
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