Global Parameters

Air temperature: 20°C
Air pressure: 101325 Pa

X Axis: Frequency
Range: 20Hz - 5000Hz
Scale: logarithmic
Resolution: medium

Angle of incidence: 0°
Porous model: Allard and Champoux (1992)
Helmholtz model: Ingard/Allard

Absorber Parameters

• Absorber 1 (3 layer 300mm 12")
100mm Porous Absorbent, 3000 Pa.s/m2
100mm Porous Absorbent, 5000 Pa.s/m2
100mm Porous Absorbent, 10000 Pa.s/m2
Rigid backing
• Absorber 2 (40 300mm 12")
300mm Porous Absorbent, 5000 Pa.s/m2
Rigid backing
• Absorber 3 (40 500mm 20")
500mm Porous Absorbent, 5000 Pa.s/m2
Rigid backing
• Absorber 4 (40 100mm air 600mm)
100mm Porous Absorbent, 5000 Pa.s/m2
600mm Air
Rigid backing