StoneHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b3-7a
Perforated brick, 40% perforation ratio
PTB reference data
Original description
Perforated brick, 40% perforation ratio
Material properties
Thickness: 60 mm
Wall distance: 200 mm
Dimensions: 240 x 240 x 60 mm
Perforation: 40%
Hole size: 10.5 x 10.5 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.18
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.15 | 0.15 | 0.15 | 0.25 | 0.25 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Method (354): Measured