The bullroarer, rhombus, or turndun is an ancient ritual musical instrument and a device historically used for communicating over great distances. It consists of a piece of wood attached to a string, which when swung in a large circle produces a roaring vibration sound.
The bullroarer, rhombus, or turndun is an ancient ritual musical instrument and a device historically used for communicating over great distances. It consists of a piece of wood attached to a string, which when swung in a large circle produces a roaring vibration sound.
Source: Wikipedia "Bullroarer" · CC BY-SA 4.0
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