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The bullroarer, Rhombus, or Turndun, is an ancient ritual musical instrument and a device historically used for communicating over greatly extended distances. It dates to the Paleolithic period, being found in Ukraine dating from 17,000 BC. Anthropologist Michael Boyd, a Bullroarer expert, documents a number found in Europe, Asia, the Indian sub-continent, Africa, the Americas, and Australia.[2]
In ancient Greece it was a sacred instrument used in the Dionysian Mysteries and is still used in rituals worldwide.[3]