Improving the performance of acoustic invisibility with multilayer structure based on scattering analysis

Cai Chen¹, Yuan Yin², Kan Wei-Wei³, Yang Jing¹, Zou Xin-Ye^{1, †,}

Sketches of the folding space mapping: (a) the virtual space consists of the bulk of the background medium; (b) the real space consists of three parts: circular area A′, annular shell B′, and the domain C outside. B′ is further divided by N bilayers with 2N rings. The mapping relationship is shown as A ↔ A′,