Sound-cloaking acoustic metamaterials are on the way
April 23, 2012
New materials that have the potential to create acoustically shielded environments may be on the way, Ars Technica reports.
In the latest development, researchers have shown how creating materials that have meandering paths for sound waves can result in a negative acoustic index of refraction.
More importantly, these materials may actually be manufacturable and work for sound waves in air — the stuff we might consider noise.
Ref.: Zixian Liang and Jensen Li, Extreme Acoustic Metamaterial by Coiling Up Space, Physical Review Letters, 2012, [DOI: 10.1103/PhysRevLett.108.114301]