Results 151 to 160 of about 547 (170)
Some of the next articles are maybe not open access.
Negative Refraction and Acoustical Cloaking
2017Negative refraction is not only the consequence of the negative mass density and negative bulk modulus of the acoustical metamaterial but also can produce phononic crystal’s band gap. Acoustical cloaking is an application of the form invariance of the acoustic field equation.
openaire +1 more source
Generalized acoustic cloaking theory.
The Journal of the Acoustical Society of America, 2008An acoustic cloak is a region enclosing an object such that acoustic waves from all directions pass through and around the cloak as though the object was not present in the fluid. The object has zero scattering strength and is therefore acoustically invisible.
openaire +1 more source
Acoustic Cloaking with Plasmonic Shells
2013This chapter presents an overview of the scattering cancellation approach applied to acoustic waves, inspired by the use of plasmonic cloaks for electromagnetic waves. Using an analogous analytical approach, we show here that isotropic and homogeneous acoustic metamaterial covers may provide strong scattering reduction over moderately broad bandwidths ...
Michael R. Haberman +2 more
openaire +1 more source
Acoustic cloaking using layered pentamode materials
The Journal of the Acoustical Society of America, 2010While receiving less attention in the literature than electromagnetic cloaking, theoretical efforts to define and create acoustic cloaks based upon mimicking coordinate transformations through use of metamaterials is of interest. The present work extends recent analysis of Norris [Proc. R. Soc. London, Ser.
Clyde L, Scandrett +2 more
openaire +2 more sources
Negative Refraction, Acoustical Metamaterials and Acoustical Cloaking
2019An introduction is given. Then, there is an explanation of the limitation of Veselago’s theory with the following coverage: introduction, gauge invariance of homogeneous electromagnetic wave equation, gauge invariance of acoustic field equation, acoustical cloaking, gauge invariance of nonlinear homogeneous acoustic wave equation; the discovery of ...
openaire +1 more source
Acoustic cloak/anti-cloak device with realizable passive/active metamaterials
Journal of Physics D: Applied Physics, 2012Abstract Utilizing the coordinate transformation method, together with exchange of variables between Maxwell's equations and the acoustic equations with axial-invariance in cylindrical coordinates, the acoustic parameters (anisotropic density and scalar bulk modulus) for an ideal cloak and an ideal anti-cloak are obtained.
Huijie Shen +5 more
openaire +1 more source
An arbitrary-shaped acoustic cloak with merits beyond the internal and external cloaks
Acoustical Physics, 2017Based on transformation acoustics, an arbitrary-shaped acoustic cloak capable of functioning as an information exchange-enabling internal cloak and a movement-allowing external cloak is presented. The general expressions of material parameters for the acoustic cloaks with arbitrarily conformal or non-conformal boundaries are derived, and then the ...
Baolei Li +5 more
openaire +1 more source
Acoustic Cloaking of Moving Objects
2013The paper describes a theoretical and numerical approach to the modeling of an acoustic meta- material for the cloaking of an object moving within a compressible medium and impinged by an acoustic perturbation due to sources co-moving with it. The interest in the extension of the acoustic cloaking theory to objects and sources in arbitrary motion stems
openaire +1 more source
A hybrid acoustic cloaking based on binary splitting metasurfaces and near-zero-index metamaterials
Applied Physics Letters, 2022Gang Wang, , Rui Yang
exaly
Reconfigurable curved metasurface for acoustic cloaking and illusion
Physical Review B, 2020Kai Yao, Krupali Donda, Yan-Feng Wang
exaly