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敖庆波,王建忠,马 军,李 烨,吴 琛,汤慧萍.超薄金属纤维复合膜材料的低频吸声性能[J].稀有金属材料与工程(英文),2020,49(11):3861~3864.[ao qing bo,wang jian zhong,ma jun,li ye,wu chen and tang hui ping.Lower frequency sound absorption of ultra-thin metal fiber complex film materials[J].Rare Metal Materials and Engineering,2020,49(11):3861~3864.]
Lower frequency sound absorption of ultra-thin metal fiber complex film materials
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Received:November 18, 2019  Revised:December 16, 2019
DOI:
Key words: metal fiber  complex structure  sound absorption properties  metal film  low frequency
Foundation item:国家自然科学基金(51701164)
Author NameAffiliation
ao qing bo,wang jian zhong,ma jun,li ye,wu chen and tang hui ping  
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Abstract:
      In this paper, focusing on the exigent requirement of ultra-thin sound absorption structure in the limited space for noise treatment, the raw material was stainless steel fiber felt, the complex film materials composed with stainless steel fiber porous material and metal film were prepared by low temperature sintering technology. The sound absorption coefficient of complex film materials was tested by B&K acoustic test platform at the frequency range from 50 Hz to 1000 Hz, and the effect of structural parameters on the sound absorption performance of complex film materials is analyzed. The results shown as follows: the effects of pore structure of metal fiber porous materials (pore diameter, wire diameter, sintering node) and number of metal film layers on the sound absorption performance of complex film materials were studied. It is found that in the frequency range of 50 Hz to 1000 Hz, the optimal structure of ultra-thin complex film materials is that the arranged order of the porous metal fiber material is fine wire diameter, small pore facing to sound source, thick wire diameter and large pore in the back. Complex copper-film inside the materials can effectively improve the sound absorption performance at low frequency.