Manufacturer
Rockfon (ROCKWOOL)
Stone wool acoustic ceilings and wall absorbers. Part of the ROCKWOOL Group.
Documents
Blanka
Rockfon Blanka
Description
Acoustic ceiling tile made of stone wool with a smooth, white surface. Sound absorption class A (αw = 0.95). 20 mm thick, edge design A, E or X. Standard format 600 x 600 mm and 1200 x 600 mm. Light reflection 86%. Moisture resistance 100% RH. Particularly dirt-repellent due to Advantage coating.
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.40 | 0.75 | 0.95 | 0.95 | 0.95 | 0.90 |
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Method (354): Measured
Mounting type: Type E – Suspended (ASTM E795: E-mounting with air space)
Room volume: 7,699 cu ft
Object area: 116 sq ft
Measurement date (354): 2023-09-15
NRC: 0.90 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.90 | 0.25 | 0.40 | 0.55 | 0.66 | 0.75 | 0.85 | 0.90 | 0.95 | 0.95 | 0.95 | 0.95 | 0.95 | 0.95 | 0.95 | 0.93 | 0.92 | 0.90 | 0.88 |
Measured values as a table (1 measurement)
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