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基于相位调制的隔声管道
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摘要
提出一种基于相位调制的方法,利用声学超材料来实现的隔声管道,内在机制是通过周期性地改变表面相位来操纵反射波矢量的方向。数值仿真结果显示改变管道表面相位能够有效地使掠入射声波产生90°的偏转,经过两次与超表面的相互作用使得声波在管道内一定距离处截止。管道具有内部结构开放和可扩展的属性
We propose a method based on the phase modulation for duct noise control which is created by acoustic metasurface. It stems from the intrinsic mechanism of manipulating the direction of the reflected wave vector by changing the surface phases periodically. Numerical results confirm the validity of our prediction that shows the ability to deflect the grazing incidence wave at an angle of π/2. Our design possesses the character of opening structure and extensible property.
引文
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    [4]Y.F.Zhu,X.Y.Zou,B.Liang,and J.C.Cheng,Appl.Phys.Lett.107(11),113501(2015).
    [5]N.F.Yu,P.Genevet,M.H.Kats,F.Aieta,J.P.Tetienne,F.Capasso,and Z.Gaburro,Science(2011).
    [6]Y.F.Zhu,X.Y.Zou,R.Q.Li,X.Jiang,J.Tu,B.Liang,and J.C.Cheng,Sci.Rep.5,10966(2015).

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