Scientists are now working to take cloaking devices from the dramatic realm of science fiction and make them real. Researchers are taking the introductory steps to make acoustic ground cloaks. These materials redirect approaching waves around an object without scattering the wave energy, concealing the object from the sound waves.
from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2018/05/180510081555.htm
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