Civil Engineering Reference
In-Depth Information
5.0
4.0
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
Model
Delany - Bazley
Mechel
-5.0
-6.0
-7.0
-8.0
-9.0
-10.0
100
1000
50
200
500
2000
5000
Figure 5.18
Real and imaginary part of the input impedance of a 50 mm thick material with a hard backing
(normal incidence). Comparison of models by Delany-Bazley and Mechel.
Frequency (Hz)
1.0
0.9
Model
Delany - Bazley
Mechel
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
50
200
500
2000
5000
100
1000
Frequency (Hz)
