2. All, with the exception of Madame Seiler, agree that the most important changes take place at or near
in female voices, and the majority consider that this applies to both sexes equally.
3. Often in males there is some laryngeal change lower than this.
4. All agree that the high falsetto of tenors is of a special quality, and produced by a mechanism of its own—i.e., all consider it a separate register—and often, at least, it begins naturally about
, which is usually, however, written an octave higher, though really sung as given above.
Fig. 51. A photographic representation of the appearances of the vocal bands when the subject is sounding first E and then F sharp, in which latter case "the vibratory portions of the vocal bands are shortened about one-sixteenth inch," according to Dr. French, who has been eminently successful in photographing the larynx. It will be noted that this is the point in the scale at which the change of register usually takes place—i.e., there is a change of mechanism corresponding to the change in quality. (French-Raymond.)