Wind chime
|
|
Windchimes.jpg
Wind chimes or Aeolian chimes are often 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 (22.4%) 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. There are formulas that help predict the proper length to achieve a particular note, though a bit of fine tuning is often needed. Wind chimes are thought to be good luck in Africa.
Chimes are also made of materials other than metal or wooden tubes or rods. Many people accept bamboo, stones, horseshoes, mechanics tools, pvc pipe, glass, seashells, old silverware, etc. as chimes. The sounds these make are not tunable to specific notes and range from pleasant tinkling to dull thuds. The feeling seems to be that if it is moved by the wind and makes a noise, it is a wind chime.
In some areas of the world chimes are used to predict the weather changes. For instance if the wind comes from the north or north west it may mean a storm or colder weather is on its way. If a chime is positioned on the north side of the house so only a north wind will move it, it can alert the inhabitants to a weather change. A south wind could mean milder temperatures are on their way, so the chime is mounted on the south side.
See also tubular bell.
External links
- Chuck's Chimes (http://www1.iwvisp.com/cllsj/windchimes/) contains good information about wind chime acoustics
- An Engineering Approach to Wind Chime Design (http://home.fuse.net/engineering/Chimes.htm)
- Making Windchimes (http://www.bc1.com/~ereiswig/chimes.htm)
- Bells worth listening to (http://www.rmit.edu.au/browse/News%20and%20Events%2FNews%2FOpenline%2F2000%2FBells%20worth%20listening%20to/)
- Beginners learn about making and tuning metal tube wind chimes.Links to making other kinds of chimes and a chime message board (http://www.geocities.com/teeley2/chimeart.html)