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Metamaterials Make Objects Invisible to Sonar

Metamaterials redirect approaching waves around an object without scattering the wave energy, concealing the object from...
Metamaterials redirect approaching waves around an object without scattering the wave energy, concealing the object from the sound waves(Credit: Peter Kerrian)

A team of researchers at Pennsylvania State University, led by Amanda D. Hanford, has developed a “cloaking device” that works underwater. The new metamaterial shield is able to intercept and bend underwater sound waves, like sonar, around it without scattering them – making it appear as if the cloak and anything within it isn’t there at all. read more