Acoustic Cloak Diverts Sound Waves
A newly developed acoustic cloak masks the object it covers by rerouting sound waves. Developed by researchers at Duke University, the cloak uses a complex pattern of perforated plastic to mask objects from sounds. It could be useful for the military as a way of shielding underwater objects from sonar detection. Engineers also hope to use it as a means for improving the acoustic performance of concert halls or opera houses. For those still awaiting their letters from Hogwarts, it’s the closest thing yet to invisibility.