Acoustic, Underwater Cloak Makes Objects Invisible To Sonar

Photo: Nicholas Fang (Source: L. Brian Stauffer)

From Daily Tech:

The cloak is used to control sound waves underwater

University of Illinois researchers have developed a cloak that can be used underwater to hide objects from sonar and other ultrasound waves.

Nicholas Fang, study leader and mechanical science and engineering professor at the University of Illinois, along with fellow researchers at the university, have created an acoustic, underwater cloak as a way of controlling sound waves.

Up until this point, scientists have been trying to push the use of materials that wrap sound around objects instead of absorbing or reflecting it. But turning the concept into a reality has been difficult.

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