Text: 14) The harmonics of a simple tube used as a trumpet are the same as those of a vibrating string, viz., the octave, twelfth, fifteenth, etc., and are produced by modifications of the breath and lips; but there is a great difference between the nature of the vibrations which produce sound, in the case of strings and pipes. In the former case the vibrations are executed at right angles to the length of the string, that is, are lateral or transverse, while in the latter they are in the direction of the pipe, or longitudinal, and are the vibrations of the air itself with it. Actually the string has all three primary modes of vibration with the lateral or transverse predominating.

See Also: LONGITUDINAL VIBRATIONS; TRANSVERSE VIBRATION; TRIPLE CURRENTS; TRIPLE FLOWS; VIBRATION MODES

Source: 125