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, †,}

Acoustic field distributions when none of the absolute values of the material parameters of SNM is equal to its counterpart of the background medium. In panels (a) and (b): ρ_α = − ρ_β = − 3ρ₀ and κ_α = − κ_β = 2κ₀; in panels (c) and (d): ρ_α = − ρ_β = − 0.5ρ₀ and κ_α = − κ_β = 0.3κ₀.