Originally titled "breathe" has been installed in 5 renditions. The latest "Sonic Tetra Curtain" is currently installed at Okechobee in Florida. You can view a local install at the Institute of mentalphysics in Joshua Tree, CA.
Dancing with the wind the Sonic Curtain allows us to see that which is invisible: The air, and the spirits winds know it. They dance a beautiful dance knowing they can be seen.