中国物理B ›› 2019, Vol. 28 ›› Issue (9): 94301-094301.doi: 10.1088/1674-1056/ab3447
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Liwei Wang(王力维), Li Quan(全力), Feng Qian(钱枫), Xiaozhou Liu(刘晓宙)
Liwei Wang(王力维)1, Li Quan(全力)2, Feng Qian(钱枫)1,3, Xiaozhou Liu(刘晓宙)1
摘要:
It is well known that the radiation efficiency of an acoustic dipole is very low, increasing the radiation efficiency of an acoustic dipole is a difficult task, especially in an ordinary waveguide. In addition, current acoustic superlenses all utilize in-phase sources to do the super-resolution imaging, it is almost impossible to realize super-resolution imaging of an acoustic dipole. In this paper, after using the Helmholtz resonator arrays (HRAs) which are placed at the upper and lower surfaces of the waveguide, we observe a large dipole radiation efficiency at the certain frequency, which gives a method to observe an acoustic dipole in the far field and offers a novel model which is promising to realize the superlens with a source of an acoustic dipole. We discuss how the arrangement of HRAs affects the transmission of the acoustic dipole.
中图分类号: (Structural acoustics and vibration)