GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.1-9
Perforated gypsum board cassette with glass veil
PTB reference data
Original description
Perforated gypsum board cassette with glass veil
Material properties
Wall distance: 100 mm
Perforation: 1.6%
Hole size: 6 mm
Backing: glass veil
Mounting: sub-frame 50/50 on 550 mm x 1150 mm grid
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.23
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.55 | 0.25 | 0.10 | 0.05 | 0.05 |
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Method (354): Measured