Global Parameters

Air temperature: 20°C
Air pressure: 101325 Pa

X Axis: Frequency
Range: 10Hz - 150Hz
Scale: linear
Resolution: medium

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

Absorber Parameters

• Absorber 1 (massive Rückwand)
19mm Perforated Panel, 50mm/400mm (1.23%)
200mm Air
400mm Porous Absorbent, 6000 Pa.s/m2
Rigid backing
• Absorber 2 ("mit offener Rückwand")
19mm Perforated Panel, 50mm/400mm (1.23%)
200mm Air
400mm Porous Absorbent, 6000 Pa.s/m2
3600mm Air
Rigid backing
• Absorber 3 (massive Rückwand)
15mm Perforated Panel, 70mm/240mm (6.68%)
200mm Air
450mm Porous Absorbent, 6000 Pa.s/m2
Rigid backing
• Absorber 4 ("mit offener Rückwand")
15mm Perforated Panel, 70mm/240mm (6.68%)
200mm Air
450mm Porous Absorbent, 6000 Pa.s/m2
3600mm Air
Rigid backing