StoneHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b3-5
Perforated brick, 250 x 125 x 50 mm, glazed, 17% perforation ratio
PTB reference data
Original description
Perforated brick, 250 x 125 x 50 mm, glazed, 17% perforation ratio
Material properties
Thickness: 50 mm
Wall distance: 25 mm
Perforation: 17%
Surface: glazed
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.13
Frequency values
αp nach ISO 11654
| f (Hz) | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|
| αp | 0.05 | 0.15 | 0.20 | 0.15 | 0.10 |
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Method (354): Measured