idiophone type of musical instrument in the percussion family
A triangle is a percussion instrument made from a metal rod bent into a three-sided shape, which produces a clear ringing sound when struck with a small metal beater. It's used in orchestras, bands, and other musical ensembles to add bright, shimmering tones to compositions.
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via Wikipedia infobox
The triangle, or musical triangle, is a musical instrument in the percussion family, classified as an idiophone in the Hornbostel-Sachs classification system. Triangles are made from a variety of metals including aluminum, beryllium copper, brass, bronze, iron, and steel. The metal is bent into a triangular shape with one open end. The instrument is usually held by a loop of some form of thread or wire at the top curve to enable the triangle to vibrate, and it is struck with a metal rod called a "beater". The triangle theoretically has indefinite pitch, and produces a plurality of overtones when struck with an appropriate beater.
History
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).