I love corregated concrete! Those highly ordered early reflections can make a cool sound if you stand about a few feet away and clap your hands. I've wondered if it was possible to vary the bands to encode a designed sound in the reflection. Probably.
Not sure about that, but more like using Impulse Response techniques like in convolution reverb, to craft a short sound that reflects back given a burst of sound like a clap.
For long sustained sounds using evenly space round rods can create sound with wind, like an Aeolean harp.
