Building Acoustics

78 Building acoustics

Figure 3.11 Absorption factor as a function of the normalised impedance components (Z = Zg/Z 0 ) of the
boundary surface. Normal incidence.

Figure 3.12 Three-dimensional plot corresponding to Figure 3.11.

0 5 10 15 20

-15

-10

-5

0

5

10

15

Real Z

Ima g Z

0.727 0.454 0.364 0.273

0.182

0.0909