StoneHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 224
Polyklet acoustic brick Type F1/F2 (perforated brick)
Polyklet Akustikstein – Typ F1, F2
PTB reference data
Original description
Polyklet acoustic brick Type F1/F2 (perforated brick)
Material properties
Manufacturer: Polyklet-Akustik
Thickness: 60 mm
Wall distance: 50 mm
Perforation: 47%
Backing: fiber absorber
Surface: perforated brick made of fired clay
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.16
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.05 | 0.15 | 0.20 | 0.20 | 0.20 |
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Method (354): Measured