GypsumHighly absorbent

Data source

PTB reference data

Physikalisch-Technische Bundesanstalt

Source: DNA-Tabelle 1968, b2.1-12

Perforated gypsum cassette with mineral fiber inlay

PTB reference data

Original description

Perforated gypsum cassette with mineral fiber inlay

Material properties

Thickness: 6 mm
Wall distance: 344 mm, 74 mm
Dimensions: 625 × 625 mm
Perforation: 15%
Hole size: 4.5 mm
Backing: paper-faced Al foil on the back (0.07 kg/m²) with 25 mm mineral fiber inlay

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 2 variants

αw
0.69

Frequency values

αp per ISO 11654

f (Hz)2505001k2k4k
αp0.850.750.800.750.50

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344 mmαw0.69
74 mmαw0.66

Dimensions: 625 x 625 mm

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