Metamaterial Provides Acoustic Cloak That Works In ... sound waves hit the plastic and penetrated most of them appeared to have traveled all the way down to the flat surface under the triangular ...

Researchers have been messing about with optical metamaterials and invisibility cloaks for a few years now. And while progress has been rapid, nobody’s going to be fooling Voldemort any time soon.

These materials redirect approaching waves around an object without scattering the wave energy, concealing the object from the sound waves. During the 175th ASA Meeting, Hanford will describe the ...

A University of Illinois research team has developed an acoustic "invisibility cloak" for underwater objects that renders objects invisible to the ultrasound spectrum.