StoneHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Wärme Kälte Schall Heft 1 (März) 1970
Polyklet acoustic perforated brick with Sillan panels
PTB reference data
Original description
Polyklet acoustic perforated brick with Sillan panels
Material properties
Wall distance: 50 mm
Perforation: approx. 43%
Backing: 30 mm Sillan acoustic panels
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.58
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.40 | 0.60 | 0.80 | 0.80 | 0.70 |
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Method (354): Measured