Acoustics researchers develop novel underwater carpet cloak

2022-07-29 20:29:15 By : Mr. Barry Tu

Click here to sign in with or

by LI Yuan, Chinese Academy of Sciences

Acoustic camouflage, realized by controlling wave propagation, has attracted much attention in recent years. Aided by a reflecting surface, acoustic carpet cloak has become one of the most practically feasible invisibility devices.

In their previous studies, researchers from the Institute of Acoustics of the Chinese Academy of Sciences (IACAS) have realized two-dimensional acoustic illusion by using a perforated plate structure in the air and then extending it underwater as a two-dimensional and three-dimensional acoustic carpet cloak. However, owing to the difficulty in the realization of ideal material parameters, the implemented cloak is still underperforming at a large angle.

To further improve the stealth performance of the underwater acoustic carpet cloak at large incident angle, IACAS researchers and their colleagues from the Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences designed an underwater carpet cloak for broadband and wide-angle acoustic camouflage using a three-component metafluid composed of syntactic foam, steel and water.

The study was published in Physical Review Applied on July 20.

They employed a four-phase model to characterize and precisely regulate the acoustic parameters of the syntactic foam. Combined with Biot theory, they realized synergetic regulation of structure and material parameters in the design of the metafluid.

By periodically embedding the syntactic foam and steel rods in water, they designed and prepared a two-dimensional underwater acoustic carpet cloak. The experiment demonstration was conducted in an anechoic water tank. Experimental results indicated that the designed carpet cloak worked well under both normal and oblique incidences with broadband frequencies.

Moreover, the introduction of syntactic foam in the design of the carpet cloak provides an extra degree of freedom for the acoustic parameter regulation of the metafluid in underwater acoustic devices. Explore further First underwater carpet cloak realized with metamaterial More information: Ping Zhou et al, Underwater Carpet Cloak for Broadband and Wide-Angle Acoustic Camouflage Based on Three-Component Metafluid, Physical Review Applied (2022). DOI: 10.1103/PhysRevApplied.18.014050 Provided by Chinese Academy of Sciences Citation: Acoustics researchers develop novel underwater carpet cloak (2022, July 28) retrieved 29 July 2022 from https://phys.org/news/2022-07-acoustics-underwater-carpet-cloak.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

More from Physics Forums | Science Articles, Homework Help, Discussion

Use this form if you have come across a typo, inaccuracy or would like to send an edit request for the content on this page. For general inquiries, please use our contact form. For general feedback, use the public comments section below (please adhere to guidelines).

Please select the most appropriate category to facilitate processing of your request

Thank you for taking time to provide your feedback to the editors.

Your feedback is important to us. However, we do not guarantee individual replies due to the high volume of messages.

Your email address is used only to let the recipient know who sent the email. Neither your address nor the recipient's address will be used for any other purpose. The information you enter will appear in your e-mail message and is not retained by Phys.org in any form.

Get weekly and/or daily updates delivered to your inbox. You can unsubscribe at any time and we'll never share your details to third parties.

Medical research advances and health news

The latest engineering, electronics and technology advances

The most comprehensive sci-tech news coverage on the web

This site uses cookies to assist with navigation, analyse your use of our services, collect data for ads personalisation and provide content from third parties. By using our site, you acknowledge that you have read and understand our Privacy Policy and Terms of Use.