Abstract In this paper, a novel composite acoustic metamaterial comprising of periodic multi-resonator and voids is proposed, in which the periodic multi-resonator and periodic voids are embedded into the sound absorption layer and the sound insulation layer, respectively. The different arrangements for the two layers are designed, and the sound absorption behaviors of the proposed combinations immersed in water are researched using finite element method. In addition, the effects of different arrangements for the two layers, the multi-resonator in sound absorption layer and the void in sound insulation layer on sound absorption behavior of the combinations are also investigated. The numerical results show that the frequency band of sound absorption of the proposed combinations can be broadened effectively due to the coupled resonance generated by multi-resonator and voids. Moreover, the different arrangements for the two layers have significant impacts on sound absorption behaviors of the combinations. The results validate that the sound absorption in the low frequency band can be enhanced effectively by distributing sound absorption layer and sound insulation layer on both sides of steel plate.

中文翻译：

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具有周期性多谐振器和水中空隙的超材料的吸声行为

摘要 本文提出了一种由周期多谐振器和空隙组成的新型复合声学超材料，其中周期多谐振器和周期空隙分别嵌入吸声层和隔声层。设计了两层的不同布置，并使用有限元方法研究了所提出的组合浸入水中的吸声行为。此外，还研究了两层不同布置、吸声层中的多谐振器和隔声层中的空隙对组合吸声行为的影响。数值结果表明，由于多谐振器和空隙产生的耦合谐振，所提出的组合的吸声频带可以有效地展宽。此外，两层的不同布置对组合的吸声行为有显着影响。结果表明，在钢板两侧布设吸声层和隔声层，可以有效提高低频段的吸声效果。