Stone & concreteHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 224
Value from the PTB table, not verified
Polyklet Akustikstein Type F1/F2 with mineral fiber backing
Polyklet Akustikstein – Type F1, F2
PTB reference data
Original description
Polyklet Akustikstein Type F1/F2 with mineral fiber backing
Material properties
Manufacturer: Polyklet-Akustik
Thickness: 60 mm
Wall distance: 50 mm
Perforation: 47%
Backing: 30 mm mineral fiber panel
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.75
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.50 | 0.85 | 0.75 | 0.85 | 0.75 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 60 mm + 30 mm mineral-fibre panel · 50 mm | 0.75 | 0.10 | 0.23 | 0.35 | 0.36 | 0.51 | 0.60 | 0.81 | 0.88 | 0.81 | 0.78 | 0.76 | 0.76 | 0.80 | 0.88 | 0.83 | 0.78 | 0.77 | 0.76 |
Measured values as a table (1 measurement)
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