Acoustic cloak

Acoustic cloak

An acoustic cloak is a technology used to build sound-proof homes, advanced concert halls or stealth warships. It was outlined in the New Journal of Physics in June 2008. Scientists had previously demonstrated devices that cloak objects from microwaves, making them "invisible". "The mathematics behind cloaking has been known for several years," said Professor John Pendry of Imperial College London, "What hasn't been available for sound is the sort of materials you need to build a cloak out of." [http://news.bbc.co.uk/1/hi/sci/tech/7450321.stm]


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