GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.2-3
Value from the PTB table, not verified
Slotted drywall panel, 9.5 mm, 8% open area
PTB reference data
Original description
Slotted drywall panel, 9.5 mm, 8% open area
Material properties
Thickness: 9.5 mm
Wall distance: 200 mm
Perforation: 8%
Hole size: 2.5 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.45
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.45 | 0.85 | 0.70 | 0.55 | 0.40 | 0.30 |
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9,5 mm · 200 mm | 0.45 | 0.40 | 0.39 | 0.58 | 0.83 | 0.89 | 0.88 | 0.78 | 0.73 | 0.60 | 0.55 | 0.55 | 0.50 | 0.42 | 0.38 | 0.37 | 0.35 | 0.37 | 0.22 | 0.38 |
Measured values as a table (1 measurement)
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