StoneHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b3-7 b
Perforated brick with mineral fiber mat backing
PTB reference data
Original description
Perforated brick with mineral fiber mat backing
Material properties
Thickness: 60 mm
Wall distance: 200 mm
Dimensions: 240 × 240 × 60 mm
Perforation: 40%
Hole size: 10.5 × 10.5 mm
Backing: 2 layers of mineral fiber mats quilted on wire mesh
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.94
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.80 | 1.10 | 1.05 | 0.95 | 1.05 | 0.90 |
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Method (354): Measured