Physicists generated sound waves that travel in one direction only(www.sciencealert.com)
40 pointsby mavci7 hours ago2 comments
  • trebligdivad5 hours ago
    oh wow, this is like an RF Circulator - https://en.wikipedia.org/wiki/Circulator - which are wacky enough in themselves.
    • Terr_4 hours 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

  • urbandw311er3 hours 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.