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In singing falsetto the false vocal cords drop down to within a quarter of an inch of the true cords and even closer, reducing the cup space in the larynx to its dimensions before mutation.

The operation consists in introducing through the glottis, by means of a specially constructed guide, a small metal or vulcanite tube furnished with a shoulder which rests against the false vocal cords.

The upper ligaments are sometimes 18 called the false vocal cords, but are more properly termed ventricular bands.

Charles Lunn, in The Philosophy of the Voice, 1878, was the first to propound the theory that the breath may be controlled by the false vocal cords.

Mr. Lunn feels sure that the true vocal cords are not involved in falsetto, that voice being produced by the false vocal cords.