"Sound waves can be cast from time to time to face eternity"
Sound propagation bas-reliefs are made of copper and wood. The forms above are sound propagation waves over water caught by an ultrafast camera .
This phenomenon is called cymatics and it consist on altering soft matter by sound. Depending on the type of sound we will see different dynamic patterns that varies from simplicity to almost chaotic complexity. Each sound has its very own path, some of them, as I believe, deserve to face eternity.