Project aims to tame noise from supersonic military jets with `swirl` technology
(PHYSorg.com Physics)

It`s cliché to describe something very noisy as `louder than a jet engine.` But supersonic jet engines, like those powering fighters flown by the U.S. military, are so much louder than regular jet engines that scientists have a special term for their sound-`broadband shock-associated noise.`