California Institute of Technology Researchers Create ‘Sound Bullets': Highly Focused Acoustic Pulses Could Be Used as Sonic Scalpels and More

CalTech -- PASADENA, Calif.—Taking inspiration from a popular executive toy (“Newton’s cradle”), researchers at the California Institute of Technology (Caltech) have built a device—called a nonlinear acoustic lens—that produces highly focused, high-amplitude acoustic signals dubbed “sound bullets.”