Researchers have developed a device that reflects sound in the direction it came from, rather than deflecting it at an angle. The 'retroreflector' can reflect sound across an operating range of 70 degrees in either direction -- more than doubling the effective range of previous technologies.
from Engineering News -- ScienceDaily https://ift.tt/2tItabI
Sunday, July 1, 2018
New tech improves ability to reflect sound back to its source
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