Weve seen some overly elaborate invisibility cloaks in our day, but Duke engineers have shown that lo-fi may be best for audio. After much refinement, theyve developed a shield that can hide objects from sound waves thanks to a highly engineered pyramid shape and carefully placed holes. The stacked layers retard sound coming from any angle, so that it appears to have bounced off a flat wall when picked up by a detector (see the video after the break).
Comments are closed.
