More on meta-materials - acoustics cloaking for sonic proof room and stealth vessels
June 27 2008 | 0 comment(s)
Spanish scientists have recently published blueprints for a physically realisable acoustics cloak. This acoustics cloak would channel sound waves around an object, much like flowing water around a smooth pebble. This would essentially render the object impervious to sound. The cloak would be made out of what the scientists term "sonic crystals", a type of meta-material which acoustic properties are based on internal structure instead of material type.
The researchers believe the sonic crystals could have a wide range of applications in construction: from sound-proofing home theatres to creating sonic proof secure rooms. As the crystals are further refined and optimised, a possibility for military application also exists, particularly to assist stealth naval vessels avoid sonar detection.
The research was recently published in the New Journal of Physics: "Acoustic cloaking in two dimensions: a feasible approach, Daniel Torrent and José Sánchez-Dehesa 2008"
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