GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.2-1a
Slotted gypsum board cassette
PTB reference data
Original description
Slotted gypsum board cassette
Material properties
Thickness: 9.5 mm
Wall distance: 30 mm
Dimensions: 625 x 625 mm
Perforation: slotted
Hole size: slot width 2.3 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.15
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.10 | 0.25 | 0.30 | 0.15 | 0.05 |
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Method (354): Measured