Wind chimes are a type of percussion instrument constructed from suspended tubes, rods, bells or other objects that are often made of metal or wood. The tubes or rods are suspended along with some type of weight or surface which the tubes or rods can strike when they or another wind-catching surface are blown by the natural movement of air outside. They are usually hung outside of a building or residence as a visual and aural garden ornament. Since the percussion instruments are struck according to the random effects of the wind blowing the chimes, wind chimes have been considered an example of chance-based music. The tubes or rods may sound either indistinct pitches, or fairly distinct pitches. Wind chimes that sound fairly distinct pitches can, through the chance movement of air, create simple melodies or broken chords.
Roman wind chimes, usually made of bronze, were called tintinnabulum and were hung in gardens, courtyards, and porticoes where wind movement caused them to tinkle. Bells were believed to ward off malevolent spirits and were often combined with a phallus, which was also a symbol of good fortune and a charm against the evil eye. The image shows one example with a phallus portrayed with wings and the feet and tail of an animal, perhaps a lion. These additions increased its protective powers.
Eastern and Southern Asia
In India during the second century CE, and later in China, extremely large pagodas became popular with small wind bells hung at each corner; the slightest breeze caused the clapper to swing, producing a melodious tinkling. It is said that these bells were originally intended to frighten away not only birds but also any lurking evil spirits. Wind bells are also hung under the corners of temple, palace and home roofs; they are not limited to pagodas. Japanese glass wind bells known as fūrin (風鈴) have been produced since the Edo period, and those at Mizusawa Station are one of the 100 Soundscapes of Japan. Wind chimes are thought to be good luck in parts of Asia and are used in Feng Shui.
Wind chime started to become modernized around 1100 B.C. after the Chinese began to cast bells. A bell without a clapper, called a yong-zhong, was crafted by skilled metal artisans and primarily used in religious ceremonies. Afterwards, the Chinese created the feng-ling, which is similar to today's modern wind bell. Feng-lings were hung from shrines and pagodas to ward off evil spirits and attract benevolent ones. Today, wind chimes are common in the East and used to maximize the flow of chi, or life's energy.
Sounds and music
A recording of wind chimes.
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Chimes produce inharmonic (as opposed to harmonic) spectra, although if they are hung at about 2/9 of their length (22.4%), some of the higher partials are damped and the fundamental rings the loudest. This is common practice in high-quality wind chimes, which are also usually hung so the centre ball strikes the centre of the wind chime's length, also resulting in the loudest sounding fundamental. Frequency is determined by the length, width, thickness, and material. There are formulas  that help predict the proper length to achieve a particular note, though a bit of fine tuning is often needed.
In instruments such as organ pipes, the pitch is determined primarily by the length of the air column, because it is the resonance of the air column that generates the sound. The pipe material helps determine the "timbre" or "voice" of the pipe, but the air column determines the pitch. In a wind chime, the vibrations of the pipe itself radiates the sound after being struck, so the air column has little to do with the pitch being produced.
Sound can be produced when the tubes or rods come in contact with a suspended central clapper in the form of a ball or horizontal disk, or with each other.
Wind chimes may be used to observe changes in wind direction, depending on where they are hung when they commence to sound.
Wind chimes can be made of materials other than metal or wood and in shapes other than tubes or rods. Other wind chimes materials include glass, bamboo, shell, stone, earthenware, stoneware and porcelain. More exotic items, such as silverware or cookie cutters, can also be recycled to create wind chimes. The selected material can have a large effect on the sound a wind chime produces. The sounds produced by recycling objects such as these are not tunable to specific notes and range from pleasant tinkling to dull thuds. The sounds produced by properly sized wind chime tubes are tunable to notes. As aluminum is the common metal with the lowest internal damping, wind chimes are often made from aluminum to achieve the longest and loudest sounding chime.
The tone depends on factors such as the material, the exact alloy, heat treatment, and whether a solid cylinder or a tube is used. If a tube is used, the wall thickness also affects the tone. Tone may also depend on the hanging method. The tone quality also depends on the material of the object that is used to hit the chimes.
With clay wind chimes, the higher the final firing temperature, the higher and more ringing the resulting tone. Earthenware clay fired at lower temperatures produces a duller sound than stoneware clay fired at higher temperatures. Stoneware wind chimes are also more durable and able to resist stronger winds without suffering chipping or damage.
Use in music
Different types of wind chimes have also been used in modern music and are listed as a percussion instrument. The following is a brief list of artists and composers who have used them:
- Olivier Messiaen: Saint-François d'Assise (one set of glass, shell and wood chimes)
- Toshiro Mayuzumi: Bugaku (one set of wood and glass chimes)
- Giles Swayne Symphony No. 1 (one set of glass chimes)
- David Sitek, of American rock band TV on the Radio, sometimes hangs a wind chime from the end of his guitar to add texture to his music.
- Koji Kondo, head composer for the Mario series of video games. A prime example is the theme music for the world "Vanilla Dome" in Super Mario World.
- Ivy Queen, on the acoustic track "Ángel Caído" from the 2004 album Real.
- The Japanese video game franchise Pokémon used the Japanese fūrin wind chimes as the basis for the Pokémon Chimecho. Its in-game cry reflects this, as it sounds like three high-pitched bells chiming one after the other.
- Mark trees are often mistakenly called wind chimes, but they are different instruments, though with a basic similar structure consisting of tubes of differing lengths that are meant to produce a tinkling or chiming sound.
Wind chime images
Old hard disk platters used as a wind chime
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- Catherine Johns (1982). Sex or Symbol?: Erotic Images of Greece and Rome. Taylor & Francis. pp. 66–68.
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- "Giant, Ominous Wind Chimes". Milwaukee Makerspace. 2011-09-29.
- "Wind chimes". Virginia Tech Multimedia Music Dictionary. Virginia Tech. 2009-01-08.
- MacKenzie, Peggy (August 25, 2007). "Crafted silver chimes hit right note; Retooled cutlery the meat and potatoes of woman's successful small business". The Toronto Star. pp. H05.
- Anderman, Joan (October 15, 2008). "Connecting with TV on the Radio". The Boston Globe. pp. B07.