StoneHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 225
Polyklet Akustikstein F2K/F2KNR with mineral fiber
Polyklet Akustikstein – Type F 2 K, F 2 KNR
PTB reference data
Original description
Polyklet Akustikstein F2K/F2KNR with mineral fiber
Material properties
Manufacturer: Polyklet-Akustik
Thickness: 90 mm (F2K), 110 mm (F2KNR)
Wall distance: 50 mm
Perforation: 47%
Backing: mineral fiber panel
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.77
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.65 | 1.00 | 0.90 | 0.85 | 0.80 |
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Method (354): Measured