Nonreciprocal Acoustics

Prof. Andrea Alù and Team Build First Nonreciprocal Acoustic Circulator: A One-Way Sound Device

Prof. Andrea Alù and Team Build First Nonreciprocal Acoustic Circulator: A One-Way Sound Device

A team of researchers led by Prof. Andrea Alù 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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