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
White-painted acoustic tiles
Polar
PTB reference data
Original description
White-painted acoustic tiles
Material properties
Manufacturer: Rockfon A/S
Thickness: 20 mm
Wall distance: 200 mm
Surface: white-painted
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.80
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.45 | 0.70 | 0.90 | 0.70 | 0.90 | 0.95 |
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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 |
|---|---|---|---|---|---|---|---|
| 20 mm · 1,7 kg / m² · 200 mm | 0.80 | 0.47 | 0.72 | 0.92 | 0.70 | 0.89 | 0.93 |
Measured values as a table (1 measurement)
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