Wind chime
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Wind chimesare a type ofpercussion instrumentconstructed from suspendedtubes,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 anotherwind-catchingsurface are blown by thenatural movement of airoutside.
They are usually hung outside of a building or residence as a visual and auralgarden 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 ofchance-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 songs orbroken chords.
History
[edit]Ancient Rome
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Roman wind chimes, usually made of bronze, were calledtintinnabulaand were hung ingardens,courtyards,andporticoeswhere wind movement caused them to tinkle. Bells were believed to ward off malevolent spirits and were often combined with aphallus,which was also a symbol of good fortune and acharmagainst theevil eye.[1]The image shows one example with a phallus portrayed with wings and the feet of an animal, and a phallus for a tail. These additions increased its protective powers.[2]
Eastern and Southern Asia
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InIndiaduring the second century CE, and later inChina,extremely largepagodasbecame popular with small wind bells hung at each corner; the slightest breeze caused the clapper to swing, made in bronze too, 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.[3]Japaneseglass wind bells known asfūrin( phong linh ) have been produced since theEdo period,[4]and those atMizusawa Stationare one of the100 Soundscapes of Japan.Wind chimes are thought to be good luck in parts of Asia and are used inFeng Shui.
Wind chimes started to become modernized around 1100 C.E. after the Chinese began to cast bells. A bell without a clapper, called ayong-zhong,was crafted by skilled metal artisans and primarily used in religious ceremonies. Afterwards, the Chinese created thefeng-ling(Phong linh), 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
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Chimes produceinharmonic(as opposed toharmonic)spectra,although if they are hung at about 2/9 of their length[5](22.4%[6][7]), some of the higher partials are damped and thefundamentalrings the loudest.[7]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.[7]Frequency is determined by the length, width, thickness, and material. There are formulas[7]that help predict the proper length to achieve a particular note, though a bit of fine tuning is often needed.
Most chimes employpentatonicortetratonic scalesas the basis for the pitches of their individual chimes as opposed to the traditional westernheptatonic scale.This is largely due to the fact that these scales inherently contain fewer dissonantintervals,and therefore sound more pleasant to the average listener when notes are struck at random.
In instruments such asorgan 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 radiate 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 centralclapperin 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.
Materials
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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, beads, keys and porcelain.[8]More exotic items, such as silverware or cookie cutters, can also be recycled to create wind chimes.[9]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.[7]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 brighter 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.
Mathematics of tubular wind chimes
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A wind chime constructed of a circular tube may be modelled as a freely vibratingEuler–Bernoulli beam[10]and the dominant frequency in cycles per second is given by:
whereLis the length of the tube,Eis theYoung's modulusfor the tube material,Iis thesecond moment of areaof the tube, and μ is the mass per unit length of the tube. Young's modulusEis a constant for a given material. If the inner radius of the tube isriand the outer radius isro,then the second moment of area for an axis perpendicular to the axis of the tube is:
The mass per unit length is:
where ρ is the density of the tube material. The frequency is then
whereW=ro-riis the wall thickness andDis the average diameterD=ro+ri. For sufficiently thin-walled tubes theW2term may be neglected, and for a given material, the main frequency is inversely proportional toL2and proportional to the diameterD.
For the main mode of vibration, there will be two nodes on the tube, where the tube is motionless during the vibration. These nodes will be located at a distance of 22.416% of the length of the tube from each end of the tube. If the tube is simply supported (not clamped) at one or both of these nodes, the tube will vibrate as if these supports did not exist. A wind chime will give the clearest and loudest tone when it is hung using one of these node points as the attachment point. These attachment points are also the same as used by other similar instrument such as thexylophoneandglockenspiel.
Use in music
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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 SwayneSymphony No. 1 (one set of glass chimes)
- David Sitek,of American rock bandTV on the Radio,sometimes hangs a wind chime from the end of his guitar to add texture to his music.[11]
- Koji Kondo,head composer for the Mario series of video games. A prime example is the theme music for the world "Vanilla Dome" inSuper Mario World.
- Ivy Queen,on theacoustic track"Ángel Caído" from the 2004 albumReal.
Influence
[edit]- The Japanese video game franchisePokémonused the Japanesefūrinwind chimes as the basis for the PokémonChimecho.Its in-game cry reflects this, as it sounds like three high-pitched bells chiming one after the other.
- Mark treesare 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.[citation needed]
Wind chime images
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A JapaneseFūrinwind chime
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A set of small wind chimes
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Wind chimes in Nagano, Japan
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Oldhard disk plattersused as a wind chime
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Quality chimes are hung at ≈2/9 and struck at 1/2 length.
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Mate Ghanta bells from Nepal
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Phye Ghan (Nepali: फ्ये गँ:)
See also
[edit]- Dreamcatcher
- Mobile (sculpture)
- Suncatcher
- World's largest windchime
- World's Largest Tuned Musical Windchime
References
[edit]- ^Catherine Johns (1982).Sex or Symbol?: Erotic Images of Greece and Rome.Taylor & Francis. pp. 66–68.
- ^"Bronze phallic wind chime (tintinabulum) ".British Museum.
- ^ Westcott, Wendell(1970). "Chapter 1: Bells of the Orient".Bells and Their Music.G.P. Putnam.LCCN76077762.
- ^ Amano, Kenichi; Kawakami, Takashi (May 28, 2007). "Foreign tourists find real Tokyo".The Nikkei Weekly.
- ^Sethares, William A.(2005).Tuning, Timbre, Spectrum, Scale,p.115.ISBN9781846281136.
- ^"Physics of Music: Make your own wind chimes".Michigan Tech.Michigan Tech. 2009-01-08.
- ^abcde"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.
- ^Hite, Lee."Say it with Chimes".Retrieved2016-08-01.
- ^Anderman, Joan (October 15, 2008)."Connecting with TV on the Radio".The Boston Globe.pp. B07.
External links
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