https://doi.org/10.1051/epjap/2009127
Acoustically conceal an object with hearing
Department of Physics and Surface Physics Laboratory (National Key Laboratory), Fudan University, 220 Handan Road, Shanghai 200433, P.R. China
Corresponding author: jphuang@fudan.edu.cn.
Received:
31
March
2009
Revised:
27
April
2009
Accepted:
6
May
2009
Published online:
3
July
2009
Following the concept of remote circular electromagnetic cloaks [Phys. Rev. Lett. 102, 093901 (2009)], here we exploit theoretically a class of rectangular cloaks that can acoustically cloak an object outside the cloaking shell. The cloaked object is no longer deafened by the cloaking shell, which is distinctly different from the existing acoustic cloaks. The function of such cloaks is justified by full wave simulations based on the finite element method. This work makes it possible to propose some applications like the stealth of submarines, which receive any incoming acoustic waves while keeping themselves undetectable to enemy's sonar devices.
PACS: 43.20.+g – General linear acoustics / 43.35.+d – Ultrasonics, quantum acoustics, and physical effects of sound / 43.40.+s – Structural acoustics and vibration
© EDP Sciences, 2009
