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Measurement of the Constants of a Single Reed Wind Vibrator

1930; Acoustical Society of America; Volume: 1; Issue: 2A_Supplement Linguagem: Inglês

10.1121/1.1901893

1520-9024

R. L. Wegel, R. R. Riez,

Diverse Musicological Studies

Single reed wind instruments are represented by certain organ pipes, by the harmonica, clarinet, saxophone, duck call and the artificial larynx. In all of these the sound is produced by the periodic modulation of a stream of air which, when passing through a “glottis” or narrow passage between the reed and a juxtaposed stationary surface or “bed,” energizes the device. The forces concerned are the attraction of the reed to its bed due to the constriction of the air stream at the glottis according to the principle of a venturi meter, the pressure of the air on the reed and on the air stream in the glottis. Vibration results when the air flow is such that the proper relative magnitudes and phases of these forces occur. These forces have been measured in a model artificial larynx and the calculated vibration conditions checked against measurements of pitch and amplitudes.