from Hacker News

Physicists generated sound waves that travel in one direction only

by mavci on 10/11/24, 8:41 PM with 3 comments

• by trebligdivad on 10/11/24, 9:59 PM

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

• by urbandw311er on 10/12/24, 12:00 AM

  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.