Table 9 Variations in averaged sound absorption coefficient with alterations in microplastics powder composition.
From: A sustainable acoustic customization of open porous materials using recycled plastics
Sample | PET powder [g] | PS powder [g] | αw—side A | αw—side B |
|---|---|---|---|---|
8 | 0.0 | 3.0 | 0.47 | 0.60 |
9 | 0.5 | 2.5 | 0.58 | 0.64 |
10 | 1.0 | 2.0 | 0.44 | 0.52 |
11 | 2.0 | 1.0 | 0.47 | 0.60 |
12 | 2.5 | 0.5 | 0.49 | 0.62 |
1 | 3.0 | 0.0 | 0.37 | 0.59 |
