Porous Absorber Calculator

Absorption

Impedance (real)

Impedance (imag)

Amend
Parameters

Global Parameters

Air temperature: 22°C
Air pressure: 101325 Pa

X Axis: Frequency
Range: 20Hz - 20000Hz
Scale: logarithmic
Resolution: medium

Angle of incidence: 0°
Model: Delany and Bazley (1970)

Absorber Parameters

•	Absorber 1 (Walls) 40mm Porous Absorbent, 6000 Pa.s/m2 60mm Air Rigid backing

•	Absorber 2 (Basstraps) 100mm Porous Absorbent, 6000 Pa.s/m2 50mm Air Rigid backing

•	Absorber 3 (Cloud) 40mm Porous Absorbent, 6000 Pa.s/m2 100mm Air Rigid backing

•	Absorber 4 (GOBO) 100mm Porous Absorbent, 6000 Pa.s/m2 100mm Air Rigid backing

Information

Dotted lines indicate that the empirical relationship used to estimate absorber properties has been used outside of its applicable range. Results may therefore be less accurate than where a solid line is displayed.