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Buzzer (whirligig)
A buzzer (buzz, bullroarer, button-on-a-string), is an ancient mechanical device used for ceremonial purposes and as a toy. It is constructed by centring an object at the midpoint of a cord or thong and winding the cord while holding the ends stationary. The object is whirled by alternately pulling and releasing the tension on the cord. The whirling object makes a buzzing or humming sound, giving the device its common name.
A buzzer is often constructed by running string through two of the holes on a large button and is a common and easily made toy.
American Indians used the buzzer as a toy and, also ceremonially, as to call up the wind. Early Indian buzzers were constructed of wood, bone, or stone, and date from at least the Fourche Maline Culture, c. 500 B.C.〔Kroeber, "The Arapaho: Religion", p 396: "A bone buzzer made of the foot-bone of a cow, and called, like a bull-roarer, 'hateikuuca,' is sometimes used in the ghost-dance to start the singing."〕〔Skinner, "'Notes on the Eastern Cree and Northern Saulteaux", p. 141: "Bull roarers of several kinds not only serve as amusements but are carried by hunters, who use them to bring the wind. The outfit consists of a central wooden disc or cylinder or of a scaphoid bone of a deer or moose. A string is attached to each side and a grip or handle place transversely at right angles to the end of the string. The whole is held loosely and the central disc revolved until the string is very much twisted. Then, by tightening and loosening the string, the cord unwinds and rewinds itself with great rapidity causing the middle piece to revolve and make a loud, buzzing noise."〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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