Research Article
Study on Sound Absorption Properties of Polyvinyl Chloride (PVC) Film Multicavity Structure Materials
Table 4
Comparison of the resonance frequency theory and experimental results of the PB structure.
| Structure | Sample thickness, h (m) | Experimental results (Hz) | Before revision | After revision | Calculation results (Hz) | Error absolute value (Hz) | Calculation results (Hz) | Error absolute value (Hz) |
| PB | 0.01 | >1600 | 1655 | ā | 1655 | ā | 0.015 | 1382 | 1351 | 29 | 1351 | 29 | 0.02 | 1174 | 1170 | 4 | 1170 | 4 | 0.025 | 1020 | 1046 | 26 | 1046 | 26 | 0.03 | 746 | 956 | 210 | 733 | 13 | 0.035 | 656 | 884 | 228 | 661 | 5 | 0.04 | 600 | 827 | 227 | 604 | 4 | 0.045 | 560 | 780 | 220 | 557 | 3 | 0.05 | 510 | 740 | 230 | 517 | 7 |
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