"A tromba marina, marine trumpet or nuns´ fiddle, (Fr. trompette marine; Ger. Marientrompete, Trompetengeige, Nonnengeige or Trumscheit, Pol. tubmaryna) is a triangular bowed string instrument used ...
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in medieval and Renaissance Europe that was highly popular in the 15th century in England and survived into the 18th century. The tromba marina consists of a body and neck in the shape of a truncated cone resting on a triangular base. It is usually four to seven feet long, and is a monochord (although some versions have sympathetically-vibrating strings). It is played without stopping the string, but playing natural harmonics by lightly touching the string with the thumb at nodal points. Its name comes from its trumpet like sound due to the unusual construction of the bridge, and the resemblance of its contour to the marine speaking-trumpet of the Middle Ages." - (en.wikipedia.org 21.12.2020)
