Sounds and Music
Chimes produce inharmonic (as opposed to harmonic) spectra, although if they are hung at about 1/5 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 and 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.
Read more about this topic: Wind Chime
Famous quotes containing the words sounds and/or music:
“While we were thus engaged in the twilight, we heard faintly, from far down the stream, what sounded like two strokes of a woodchopper’s axe, echoing dully through the grim solitude.... When we told Joe of this, he exclaimed, “By George, I’ll bet that was a moose! They make a noise like that.” These sounds affected us strangely, and by their very resemblance to a familiar one, where they probably had so different an origin, enhanced the impression of solitude and wildness.”
—Henry David Thoreau (1817–1862)
“But the dark changed to red, and torches shone,
And deafening music shook the leaves; a troop
Shouldered a litter with a wounded man,
Or smote upon the string and to the sound
Sang of the beast that gave the fatal wound.”
—William Butler Yeats (1865–1939)