Composed by 26 strings in the equilateral triangle metal frame. One side of the triangle is curved to sustain against the high tension of strings. Each string has a sound box which is a brass tube, and longitude of the tube is calculated to have the same frequency with each string when the air vibes inside of the tube. The longest tube is 8.7m that sounds C0: Do about 19hz, which is said, the frequency that human eye balls resonate. And therefore you can have a phenomenon that you could see a ghost on your eyes.
Dimensions: Width: 3,6 m / Height: 3,5 m / Length: 9 m