Research Article
Fractal Model for Acoustic Absorbing of Porous Fibrous Metal Materials
Table 4
The calculated and measured static flow resistivities of different tortuosity fractal dimensions.
| Number | | Sample #1 | Sample #2 | Sample #3 | Static flow resistivity σ (Nm−4s) | Measured value σ (Nm−4s) | Deviation (%) | Static flow resistivity σ (Nm−4s) | Measured value σ (Nm−4s) | Deviation (%) | Static flow resistivity σ (Nm−4s) | Measured value σ (Nm−4s) | Deviation (%) |
| #1 | 1.02 | 83737 | 98756 | 15.21 | 31233 | 34655 | 9.87 | 16677 | 19748 | 15.55 | #2 | 1.05 | 93381 | 5.44 | 34684 | 0.08 | 18366 | 7.00 | #3 | 1.07 | 100410 | 1.67 | 37190 | 7.31 | 19584 | 8.30 | #4 | 1.08 | 104120 | 5.43 | 38510 | 11.12 | 20223 | 2.41 | #5 | 1.10 | 111960 | 13.37 | 41289 | 19.14 | 21564 | 9.20 | Mean value | 1.06 | 96834 | 1.95 | 35915 | 3.63 | 18965 | 3.96 |
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