Reference surfaceLow absorption
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: M. Heckl, H.A. Müller: Taschenbuch der Technischen Akustik, Springer 1994
Value from the PTB table, not verified
Drywall panel, 18 mm, 16 kg/m², 400 mm wall distance
PTB reference data
Original description
Drywall panel, 18 mm, 16 kg/m², 400 mm wall distance
Material properties
Thickness: 0.7 in
Wall distance: 16 in
Surface weight: 16 kg/m²
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.05
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.10 | 0.05 | 0.05 | 0.05 | 0.05 |
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Value from the PTB table, not verified
NRC: 0.05 (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 |
|---|---|---|---|---|---|---|---|
| 18 mm · 16 kg/m^2 · 400 mm | 0.05 | 0.10 | 0.09 | 0.05 | 0.05 | 0.07 | 0.04 |
Measured values as a table (1 measurement)
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