The triangle is a small instrument made of a metal rod bent into a triangle shape that is open at one corner. While small, its sound is distinct, with multiple overtones and nonharmonic resonance.

notes that video game graphics are composed of countless tiny triangles because they can be computed more quickly than other shapes and that civil engineers favor triangular support structures ...

test assumptions about the contribution of the triangle shape, and capture clear documentation through pictures of the sound waves around the triangle. Using acousto-optic imaging to study ...