Wednesday 27 May 2015

Aeolian harp:

The first known Aeolian harp was constructed by Athanasius Kircher and was described in his Musurgia Universalis (1650). The Aeolian harp was popular in Germany and England during the Romantic movement of the late 18th and 19th centuries. Two attempts to devise a keyboard version using a bellows were the anémocorde (1789), invented by Johann Jacob Schnell, and the piano éolien (1837), by M. Isouard. Aeolian harps are also found in China, Indonesia, Ethiopia, and Melanesia.


The quality of sound depends on many factors, including the lengths, gauges, and types of strings, the character of the wind, and the material of the resonating body. Metal-framed instruments with no sound board produce a music very different from that produced by wind harps with wooden sound boxes and sound boards. There is no percussive aspect to the sound like that produced by a wind chime; rather crescendos and decrescendos of harmonic frequencies are played in rhythm to the winds. Their vibrant timbres produce an ethereal, almost mystical, music that many people find alludes to higher realms.

The strings can be made of different materials (or thicknesses) and all be tuned to the same pitch, or identical strings can be tuned to different pitches. Besides being the only strung instrument played solely by the wind, the Aeolian harp is the only stringed instrument that plays solely harmonic frequencies.

The Aeolian harp - already known in the ancient world – was first described by Athanasius Kircher (1602–1680) in his book Phonurgia nova (1673). It became popular as a household instrument during the Romantic Era, and Aeolian harps are still hand-crafted today. Some are now made in the form of monumental metal sound sculptures located on the roof of a building or a windy hilltop.

The quality of sound depends on many factors, including the lengths, gauges, and types of strings, the character of the wind, and the material of the resonating body. Metal-framed instruments with no sound board produce a music very different from that produced by wind harps with wooden sound boxes and sound boards. There is no percussive aspect to the sound like that produced by a wind chime; rather crescendos and decrescendos of harmonic frequencies are played in rhythm to the winds. Their vibrant timbres produce an ethereal, almost mystical, music that many people find alludes to higher realms.


Aeolian harp, (from Aeolus, the Greek god of the winds), a type of box zither on which sounds are produced by the movement of wind over its strings. It is made of a wooden sound box about 1 metre by 13 cm by 8 cm (3 feet by 5 inches by 3 inches) that is loosely strung with 10 or 12 gut strings. These strings are all of the same length but vary in thickness and hence in elasticity. The strings are all tuned to the same pitch. In the wind they vibrate in aliquot parts (i.e., in halves, thirds, fourths…), so that the strings produce the natural overtones (harmonics) of the fundamental note: octave, 12th, second octave, and so on. For a more technical explanation of the phenomenon, see sound: Standing waves.

The principle of natural vibration of strings by the pressure of the wind has long been recognized. According to legend, King David hung his kinnor (a kind of lyre) above his bed at night to catch the wind, and in the 10th century Dunstan of Canterbury produced sounds from a harp by allowing the wind to blow through its strings.

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