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| Acoustic absorption of porous electrolytic iron–nickel panel with cavity |
| YU Wuzhou; LIN Lei; WANG Zuomin |
| Institute of Acoustics; Tongji University; Shanghai 200092 |
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Cite this article:
YU Wuzhou LIN Lei WANG Zuomin. Acoustic absorption of porous electrolytic iron–nickel panel with cavity. Chin J Mater Res, 2009, 23(1): 32-38.
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Abstract Acoustic absorption of single–layer porous electrolytic iron–nickel panels with different parameters was measured and analyzed, as well as double–layer porous electrolytic iron–nickel panels. Porous electrolytic iron–nickel panel was idealized as micro–perforated panel with ultra–minute perforation to calculate sound absorption applying statistical average hole diameter and hole space by Maah‘s theory. Porous electrolytic iron–nickel panel with back cavity exhibited resonant absorption character and performed good sound absorption. For single–layer porous electrolytic iron–nickel panel with cavity, calculations by Maah's theory were in concord with measurement results. For double–layer structure, calculation presented frequency character of absorption and maximum absorption coefficient similar to measurements, but there existed frequency shift of maximum absorption between calculation and measurement results.
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Received: 07 May 2008
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