GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 200
Value from the PTB table, not verified
Knauf Perlgips perforated gypsum board, straight-drilled 10/23
Perlgips perforated board – straight-drilled 10/23
PTB reference data
Original description
Knauf Perlgips perforated gypsum board, straight-drilled 10/23
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 0.4 in
Wall distance: 2.1 in
Perforation: 14.8%
Hole size: 0.4 in
Backing: Paratex non-woven and 0.8 in mineral fiber mat
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.70
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.45 | 0.95 | 0.80 | 0.50 | 0.40 |
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Value from the PTB table, not verified
NRC: 0.70 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9,5 mm · ca. 7 kg / m² · 53 mm | 0.70 | 0.13 | 0.21 | 0.30 | 0.41 | 0.60 | 0.82 | 1.04 | 0.94 | 0.87 | 0.79 | 0.69 | 0.60 | 0.52 | 0.45 | 0.40 | 0.36 |
Measured values as a table (1 measurement)
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