Keywords: 
• 声学超构材料 /
• 局域共振 /
• 亚波长 /
• 负质量密度 /
• 负模量

Abstract: Acoustic metamaterials, artificial structures with structural units much smaller than the operating wavelength and possessing unusual properties, were first reported in 2000, when they were called locally resonant sonic materials. Like electromagnetic metamaterials, acoustic metamaterials have also attracted much attention in recent years materials are reviewed, including the rea In this article, the main advances in the lization of negative acoustic parameters research of acoustic meta- by introducing local reso nances in the medium, and the determination of various acoustic parameters for metamaterials without local resonances. Finally, an overview is given of the prospects for potential applications.