Noise pollution is an important problem affecting people’s lives and work quality. In the current noise reduction materials, the porous sound absorption materials usually only haveagood sound absorption effect for medium and high -frequency sound waves, and the sound absorption effect for low -frequency sound waves is relatively weak. However, in recent years, the research on acoustic metamaterials has made a breakthrough which can effectively absorb or isolate low-frequency sound waves. Therefore, researchers propose to combine porous sound-absorbing materials with acoustic metamaterials to form a composite structure, that broadens the frequency range of noise reduction, so as to achieve the goal of full-frequency domain noise reduction. This paper first introduces the research progress of porous materials and acoustic metamaterials, and then introduces the research progress of composite structures that are made of porous materials and acoustic metamaterials. Finally, the application prospect of the composite field of porous sound-absorbing materials and acoustic metamaterials are summarized.

中文翻译：

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多孔材料与声学超材料复合结构降噪研究进展

噪声污染是影响人们生活和工作质量的重要问题。目前的降噪材料中，多孔吸声材料通常仅对中高频声波具有良好的吸声效果，对低频声波的吸声效果相对较弱。然而近年来，声学超材料的研究取得了突破，可以有效吸收或隔离低频声波。因此，研究人员提出将多孔吸声材料与声学超材料结合形成复合结构，拓宽降噪频率范围，从而达到全频域降噪的目的。本文首先介绍了多孔材料和声学超材料的研究进展，然后介绍了多孔材料和声学超材料复合结构的研究进展。最后总结了多孔吸声材料与声学超材料复合领域的应用前景。