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Innovation

A One-Way Sound Device

UT Austin Engineers Build First Nonreciprocal Acoustic Circulator
A team of researchers at The University 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.

“Using the proposed concept, we were able

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