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. 2020 Oct 9;13(20):4474. doi: 10.3390/ma13204474

Figure 5.

Figure 5

Influence of the sample thickness on the frequency dependencies of the sound absorption coefficient for the tested ABS samples: (a) Cartesian structure, volume ratio Vr = 44%, air space size a = 12 cm; (b) Starlit structure, volume ratio Vr = 70%, air space size a = 0 cm.