The Last Word On Nothing | Whispering Walls and the Nature of Acoustic Geometry

In caves and rock walls of the southern Utah desert, pictographs have been painted, added to the backs of clamshell-shaped sandstone enclosures. Many are noted to have acoustic properties, meaning these ancient, Indigenous images seem to be correlated with the way sound reflects around them. I’ve spoken in a normal voice back and forth from one sheltered rock art panel to another an eighth of a mile downcanyon. The way sound spreads and is refocused, we could hear each other’s every word.
Read more: http://www.lastwordonnothing.com/2017/11/21/acoustic-architecture/?source=Snapzu