An acoustic bending waveguide designed by anisotropic density-near-zero metamaterial
Wang Yang-Yang1, Ding Er-Liang1, Liu Xiao-Zhou1, 2, †, , Gong Xiu-Fen1
       

The schematic graph of a 2D acoustic waveguide structure, whose input and output waveguides (regions 0 and 2) are filled with water with an effective density of ρ0 = 1000 kg/m3 and an effective bulk modulus of κ0 = 2.25 GPa, consists of an ADNZ metamaterial (region 1). The parallel lines in the x direction are hard walls.