A three-dimensional coupled-mode model for the acoustic field in a two-dimensional waveguide with perfectly reflecting boundaries

Luo Wen-Yu^{1, †,}, Yu Xiao-Lin^{1, 2}, Yang Xue-Feng^{2, 3}, Zhang Ze-Zhong^{1, 2}, Zhang Ren-He¹

TL in the horizontal plane z = 30 m computed by (a) the analytical image solution and (b) DGMCM3D.