welcome to the future
June 13, 2008 Leave a comment
Sound waves are channelled around an object by sonic crystals
Scientists have shown off the blueprint for an “acoustic cloak”, which could make objects impervious to sound waves.
The technology, outlined in the New Journal of Physics, could be used to build sound-proof homes, advanced concert halls or stealth warships.
Scientists have 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, UK, an expert in cloaking.
“It’s not an unrealistic blueprint – it doesn’t demand that we do extraordinary things,” he said. “This is something that can easily be manufactured.”
If a material could be commercialised, both researchers believe it could have many applications.
Walls of the material could be built to soundproof houses or it could be used in concert halls to enhance acoustics or direct noise away from certain areas.
The military may also be interested, the researchers believe, to conceal submarines from detection by sonar or to create a new class of stealth ships.