A multilayer structured acoustic cloak with homogeneous isotropic materials

An acoustic cloak with concentric alternating layered structure is designed with homogeneous isotropic materials on the basis of effective medium theory. The cloak possesses low-reflection and power-flow bending properties for different shapes of wavefront both in far- and near-fields, which could perfectly approximate the ideal cloak with inhomogeneous and anisotropic distribution of material parameters. (C) 2008 American Institute of Physics.