GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.1-13
Perforated gypsum cassette with mineral fiber inlay and aluminum foil
PTB reference data
Original description
Perforated gypsum cassette with mineral fiber inlay and aluminum foil
Material properties
Thickness: 6 mm + aluminum foil + 25 mm mineral fiber inlay
Wall distance: 344 mm
Dimensions: 625 × 625 mm
Perforation: 15%
Hole size: 4.5 mm
Backing: aluminum foil, 25 mm mineral fiber inlay
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.75
Frequency values
αp nach ISO 11654
| f (Hz) | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|
| αp | 0.90 | 0.80 | 0.85 | 0.75 | 0.55 |
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Method (354): Measured