Lab Report: Health, Science and Medicine

(2 of 2)

Does the sound of the dentist's drill set your teeth on edge? Then you'll want to thank a group of researchers who came up with a device that cancels out the drill's whine. Plug your headphones and MP3 player into the sound-wave-eliminating system, and all you'll hear are your favorite tunes, minus the whir of the drill. Alas, the inventors are still seeking an investor to bring the system to market.