August 6, 2014
Lawrence Berkeley National Laboratory (Berkeley Lab) researchers have developed a technique to generate an acoustic bottle-like “object” in open air from sound. The virtual object can bend the paths of sound waves along prescribed convex trajectories.
The new technique could allow for super-high-resolution imaging, acoustic cloaking (without requiring engineered metamaterials), and other exotic applications.
As shown in the illustration above, the acoustic “bottle” is in the… read more