'Cloak' Could Make Objects Invisible to Sound Waves

A device that prevents sound waves from reflecting off objects is a scientific possibility, a group of researchers has announced.

"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," Steven Cummer, a professor of engineering at Duke University, said in a news release on Thursday.

Cummer and a team of researchers wanted to disprove a previous theory that suggested a three-dimensional sound cloak, which would surround an object and allow sound waves to travel around it without distortion, was a scientific impossibility.