No sound can go faster than light. But a sound pulse, or more precisely, all the wavelengths associated to a sound, have a "group velocity" that far exceeds the real physical limits.

This is the first time that sound has been converted to light. The findings, which were published this week in Nature Physics, could improve how computer chips, LEDs, ...

Military funded researchers are preparing to test a nonlethal weapon that combines light and sound. Nicholas C. Nicholas, chief scientist of Penn State’s Applied Research Laboratory, told an ...