High Quality Content by WIKIPEDIA articles! 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.