Reference surfaceLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, c1-6
Value from the PTB table, not verified
Gypsum board, coffered, with mineral fiber backing
PTB reference data
Original description
Gypsum board, coffered, with mineral fiber backing
Material properties
Thickness: 0.5 in
Wall distance: 1.2 in
Dimensions: 625 × 25 in
Surface weight: 11 kg/m²
Backing: 0.8 in mineral fiber panel
Flow resistance: 33.2 Rayl/cm
No measurement data available.