摘要
声学的外套基于并列转变具有大热门兴趣并且在象健全透明性和屏蔽那样的潜在的应用有诺言。有分离的同类的层的数量的声学的外套的频率反应被声学的散布理论分析。散布生气的节的声学的总数上的并列转变功能的效果被讨论完成与仅仅各向异性的 metamaterials 的一些层的低散布。另外,和在在外套壳内的分离的层之间的接口的声学的波浪相互作用的物理被讨论。这些结果提供设计 multilayered 的一个更好的方法有更少层的声学的外套。
Acoustic cloak based on coordinate transformation is of great topical interest and has promise in potential appli- cations such as sound transparency and insulation. The frequency response of acoustic cloaks with a quantity of discrete homogeneous layers is analyzed by the acoustic scattering theory. The effect of coordinate transforma- tion function on the acoustic total scattering cross section is discussed to achieve low scattering with only a few layers of anisotropic metamaterials. Also, the physics of acoustic wave interaction with the interfaces between the discrete layers inside the cloak shell is discussed. These results provide a better way of designing a multilayered acoustic cloak with fewer layers.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 11004250 and 51275519.