Sound Absorption Calculator — Formule
## Room Sound Absorption
Total absorption determines how quickly sound energy is removed from a room.
### Formula
**A = sum(S_i * alpha_i)**
- *S_i* = area of surface i
- *alpha_i* = absorption coefficient (0 = perfect reflection, 1 = perfect absorption)
This value feeds into the Sabine equation for reverberation time.
Total absorption determines how quickly sound energy is removed from a room.
### Formula
**A = sum(S_i * alpha_i)**
- *S_i* = area of surface i
- *alpha_i* = absorption coefficient (0 = perfect reflection, 1 = perfect absorption)
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).
- A = 100*0.05 + 80*0.3 + 50*0.6
- A = 5 + 24 + 30 = 59 m2 Sabine
- Average alpha = 59 / 230 = 0.257