One-Way Sound Walls Proven Possible

disco_tracy writes "Imagine a room where a band is playing. Neighbors can't hear the music, but if someone outside the room is talking, the musicians can hear it. The concept — a kind of one-way mirror for sound — seems imaginary, but two Italian scientists recently pushed this kind of sound manipulating technology closer to reality (abstract)."

Wave diode applicable to light?

[Garble Snarky]

The article describes the proposed theoretical mechanism as a "wave diode" - I wonder if the same principle is applicable to light? I don't know if "light diodes" already exist in some sense, but that seems like a possibly useful component for optical computing...?

Re:I hope it works.

[operagost]

I'm not sure what this had to do with sound, but what you're thinking of already exists and it's called a peltier.