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Wind chimes or Aeolian chimes are hollow or solid metal or wooden tubes which are usually hung outside of a building and are intended to be played by the wind, which causes the chimes to strike each other or a metal, wood, or rubber ball which may be hung in the center.
Windchimes produce inharmonic (as opposed to harmonic) spectra, although if they are hung at about 1/5th of their length (22.2%) the higher partials are dampened and the fundamental is brought out. This is common practice in high quality windchimes, which are also usually hung so the center ball strikes the center of the windchime's length. Frequency is determined by the length, width, thickness, and material.
See also tubular bell.
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