[jaywills]

Looks interesting:

http://www.popsci.com/science/article/2011-07/acoustic-diode-only-lets-sound-travel-one-way-opens-door-true-soundproofing

[bpape]

Interesting theory, but it's not soundproofing.  They're talking about sound absorption - not the ability to stop sound from moving between 2 spaces.

Bryan

[MaxCast]

that's a tough choice.  Do we let music out of the room and keep outside noise out or keep music in the room and let noise in           

[Nuance]

that's a tough choice.  Do we let music out of the room and keep outside noise out or keep music in the room and let noise in           

It's kind of a depressing thought when you put it like that. Great question, though.

[jtwrace]

let music out of the room and keep outside noise out or keep music in the room and let noise in           

Keep music in and keep noise out.   

[bpape]

Don't think of it as not letting music out.  Think of it more as keeping it in a controlled situation.

Bryan

[gooberdude]

The way the article reads, sounds like capturing sound waves to generate electricity is the main goal.  for use in factories & mfgr'ing facilities.

a stereo system that charged its own batteries during use would be cool though.