Research Article
Corn Husk Fiber-Polyester Composites as Sound Absorber: Nonacoustical and Acoustical Properties
Table 2
Nonacoustical properties of samples.
| | Sample | Thickness (mm) | Density (Kg⋅m3) | Porosity
ε | Air-flow resistivity, R (Pa⋅s⋅m−2) | Tortuosity,
σ |
| | PF-E | 20 | 640.5 | 0.6474 | 44,980 | 1.272 | | PF-G | 20 | 383.4 | 0.7053 | 29,353 | 1.208 | | PF-H | 20 | 304.1 | 0.7247 | 25,424 | 1.190 | | PF-I | 20 | 244.1 | 0.7457 | 21,576 | 1.171 | | PF-K | 20 | 198.0 | 0.7582 | 19,568 | 1.160 | | PF-M | 20 | 158.3 | 0.7954 | 14,435 | 1.128 |
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