Underwater asymmetric acoustic transmission structure using the medium with gradient change of impedance
Bo Hu(胡博), Jie Shi(时洁), Sheng-Guo Shi(时胜国), Yu Sun(孙玉), Zhong-Rui Zhu(朱中锐)
Chin. Phys. B . 2016, (2): 24305 -024305 .  DOI: 10.1088/1674-1056/25/2/024305