To Hear Without Being Heard: First Nonreciprocal Acoustic Circulator Created, University of Texas Study

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A team of researchers at The Univ. of Texas at Austin’s Cockrell School of Engineering has built the first-ever circulator for sound. The team’s experiments successfully prove that the fundamental symmetry with which acoustic waves travel through air between two points in space — if you can hear, you can also be heard — can be broken by a compact and simple device.

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