Acoustic Modelling
Porous Absorber Calculator
Helmholtz Absorber Calculator
Multi-layer Absorber Calculator
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Results
Documentation
Global Parameters
    °C
    Pa
Number of absorbers to be modelled  
Number of layers per absorber  
Results format  
X Axis  
   -  Hz
X scale  
Resolution  
Normalise impedances  
    Hz
Random incidence  
    
Porous model  
Helmholtz model  
Parameter Options
Angle of incidence
Analysis frequency
Porous model
Helmholtz model
Absorber 1 (blue)Legend
Layer 1         
 
 
Layer 2         
 
 
Layer 3         
 
 
Layer 4        Closest to rigid backing 
 
 
Random incidence       
       Porous model  Helmholtz model 
Absorber 2 (green)Legend   
Layer 1         
 
 
Layer 2         
 
 
Layer 3         
 
 
Layer 4        Closest to rigid backing 
 
 
Random incidence       
       Porous model  Helmholtz model 
Absorber 3 (red)Legend   
Layer 1         
 
 
Layer 2         
 
 
Layer 3         
 
 
Layer 4        Closest to rigid backing 
 
 
Random incidence       
       Porous model  Helmholtz model 
Absorber 4 (orange)Legend   
Layer 1         
 
 
Layer 2         
 
 
Layer 3         
 
 
Layer 4        Closest to rigid backing 
 
 
Random incidence       
       Porous model  Helmholtz model