Impedance approach to modeling and designing acoustic metamaterials

Abstract

Theoretical solutions to the problems of acoustic invisibility (cloaking), of superabsorber of sound and some other are obtained in terms of certain surface impedance characteristics. The solutions can be realized with the help of coatings made of 2D acoustic or mechanical metamaterials that provide the needed surface impedances. Results of computer simulation and laboratory experiments of applying the impedance approach to the problems of cloaking and of the best absorber of sound are presented.