National Geographic News, Reporting Your World Daily

Monday, November 23, 2009

Photo: Acoustic "Invisibility" Cloaks Possible, Study Says


Email to a Friend	<< Back to Full Story

Sound waves—pictured in this simulation moving from left to right&#&8212;would bend around an object cloaked in a theoretical material—pictured here in green—that scientists say is possible.

After passing over the acoustic "invisibility" cloak, the waves would resume their original courses, said Steven Cummer, the lead author of a study published this month.

Image courtesy Steven Cummer/Duke University