GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.1-9
Value from the PTB table, not verified
Perforated gypsum board cassette with glass veil (DNA 1968, b2.1-9)
PTB reference data
Original description
Perforated gypsum board cassette with glass veil (DNA 1968, b2.1-9)
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
0.10
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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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 100 Hz | 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 | 5000 Hz | 6300 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 mm | 0.10 | 0.18 | 0.26 | 0.38 | 0.55 | 0.64 | 0.43 | 0.33 | 0.26 | 0.15 | 0.13 | 0.08 | 0.08 | 0.05 | 0.04 | 0.04 | 0.05 | 0.08 | 0.08 | 0.05 |
Measured values as a table (1 measurement)
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