‘We’ve devised a recipe for an acoustic material that would essentially open up a hole in space and make something inside that hole disappear from sound waves.’
In 2006, researchers at Duke and the Imperial College London used a new design theory to create a blueprint for an electromagnetic invisibility cloak. Only a few months later, the team demonstrated the first such cloak, designed to operate at microwave frequencies.
‘In my mind, waves are waves. It was hard for me to imagine that something you could do with electromagnetic waves would be completely undoable for sound waves.’
Steven Cummer, Jeffrey N. Vinik Associate Professor of Electrical and Computer Engineering at Duke’s Pratt School of Engineerin.
Full story at Duke News