中国物理B ›› 2016, Vol. 25 ›› Issue (2): 24305-024305.doi: 10.1088/1674-1056/25/2/024305
所属专题： Virtual Special Topic — Acoustics
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
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)
- 1. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China;
2. Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, China
Underwater asymmetric acoustic transmission structure using the medium with gradient change of impedance
Bo Hu(胡博)1,2, Jie Shi(时洁)1,2, Sheng-Guo Shi(时胜国)1,2, Yu Sun(孙玉)1,2, Zhong-Rui Zhu(朱中锐)1,2
- 1. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China;
2. Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, China
摘要： We propose an underwater asymmetric acoustic transmission structure comprised of two media each with a gradient change of acoustic impedance. By gradually increasing the acoustic impedances of the media, the propagating direction of the acoustic wave can be continuously bent, resulting in allowing the acoustic wave to pass through along the positive direction and blocking acoustic waves from the negative one. The main advantages of this structure are that the asymmetric transmission effect of this structure can be realized and enhanced more easily in water. We investigate both numerically and experimentally the asymmetric transmission effect. The experimental results show that a highly efficient asymmetric acoustic transmission can be yielded within a remarkable broadband frequency range, which agrees well with the numerical prediction. It is of potential practical significance for various underwater applications such as reducing vibration and noise.
中图分类号: (Underwater sound)
- 43.30.+m