This is the acoustic hyperlens developed by the Xiang Zhang research group. Think of it as a radar dish for sound waves. Put into practice, it can increase performance of ultrasound baby-spotting and sonar submarine sighting by 8x. [EurekAlert, popsci]
James-Mac
Tuesday, October 27, 2009 at 12:05 PMIf you monted that on a submarine it would make more noise than it picks up.