GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Dalenbäck, Datensatz der CATT-Software, November 2000. Data-Category in CATT: PLASTER8, C: Walls, D: Perf.
Value from the PTB table, not verified
Walls, perforated 13 mm gypsum board (11%), d = 5 mm, on studs and mineral wool
PTB reference data
Original description
Walls, perforated 13 mm gypsum board (11%), d = 5 mm, on studs and mineral wool
Material properties
Thickness: 0.5 in
Perforation: 11%
Hole size: 0.2 in
Backing: mineral wool
Application: wall
Mounting: on studs
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.65
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.30 | 0.70 | 1.00 | 0.50 | 0.30 |
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Value from the PTB table, not verified
NRC: 0.65 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.65 | 0.18 | 0.32 | 0.71 | 0.99 | 0.50 | 0.29 |
Measured values as a table (1 measurement)
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