About this data. Figures are reproduced from the Decor Systems Acoustic Data Pack (2025). Testing was carried out at the open areas and cavity depths listed; nothing shown here is interpolated between tested buildups.
Where a cavity depth falls between two tested depths, the lower-performing of the two tested results is shown, so the figure is never better than something that has been tested.
Tested open areas: 8.80%, 12.60%, 13.10%, 15.80%, 18.10%, 23.20% and 35.30%. Tested cavities: 65, 100 and 200mm, with and without a 14kg/m³ 50mm insulation blanket.
NRC is the average of the 250, 500, 1000 and 2000 Hz coefficients, rounded to the nearest 0.05. For project-specific advice contact Decor Systems on 1800 835 035 or letstalk@decorsystems.com.au
Decor Systems / Acoustic performance calculator