Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
Rockfon Koral white-painted acoustic tiles
Koral
PTB reference data
Original description
Rockfon Koral white-painted acoustic tiles
Material properties
Manufacturer: Rockfon A/S
Thickness: 25 mm
Wall distance: 200 mm
Surface: white-painted
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.90
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.55 | 0.80 | 0.90 | 0.80 | 0.95 | 0.85 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 25 mm · 2,2 kg / m² · 200 mm | 0.90 | 0.53 | 0.81 | 0.88 | 0.82 | 0.93 | 0.87 |
Measured values as a table (1 measurement)
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