Metal sheet, stainless steel, concrete
Eco Sound is a wind powered sound sculpture. It works in the same matter as a music box though it is wind powered but may also be turned by hand. The sculpture has been part of the Sonic Sculpture exhibition at Herald Herlin Learning Centere in Otaniemi, Espoo.
The sculpture has also been presented in an article in Kustportal: https://kunstportal.art/the-world-of-sounds/