Physicists generated sound waves that travel in one direction only

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	Physicists generated sound waves that travel in one direction only (sciencealert.com)
	58 points by mavci 617 days ago

2 comments

trebligdivad 617 days ago

oh wow, this is like an RF Circulator - https://en.wikipedia.org/wiki/Circulator - which are wacky enough in themselves.

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Terr_ 617 days ago

> three- or four-port device that only allows a microwave or radio-frequency (RF) signal to exit through the port directly after the one it entered

Perhaps only superficially related (IANAElectricalEngineer) but that makes me think of multi-phase mercury arc-rectifiers.

https://en.wikipedia.org/wiki/Mercury-arc_valve

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urbandw311er 617 days ago

I’d love to understand, in a real world test, if the modified sounds waves would then bounce off nearby walls and end up echoing back anyway, thus nullifying any utility of the discovery.

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