About Rockfon Sonar dB 41
A 35mm Sonar tile with a high-performance backing membrane that reduces sound travelling between rooms over partition heads. It drops into standard 15mm or 24mm grid, so it is a straightforward way to improve privacy in offices and treatment rooms.
Key performance
| Sound absorption (αw) | 0.90 (Class A) |
|---|---|
| Room to room sound insulation | Dn,f,w = 41 dB |
| Direct sound insulation | Rw = 21 dB |
| Reaction to fire | A1 |
| Thermal insulation | λD = 40 mW/mK; R = 0.85 m2K/W |
| Edges | A24, E15, E24 |
| Module sizes (mm) | 600 x 600 x 35, 1200 x 600 x 35 |
| Weight (kg/m2) | 5.6 |
Source: Rockfon Sonar dB 41 datasheet, 04.2026. Figures quoted exactly from the manufacturer's datasheet; confirm with Rockfon before specifying.
Acoustic performance
| Edge / Thickness (mm) / Suspension (incl. tile - mm) | αw | Absorption class | NRC |
|---|---|---|---|
| 35 / 200 | 0.90 | A | 0.85 |
Selected rows; full table in the technical datasheet.