As the voice ascends in the scale each note is different, and as one goes on up the positions of the organ of the throat cannot remain the same for several different tones. But there should never be an abrupt change, either audible to the audience or felt in the singer's throat. Every tone must be imperceptibly prepared, and upon the elasticity of the vocal organs depends the smoothness of the tone production. Adjusting the vocal apparatus to the high register should be both imperceptible and mechanical whenever a high note has to be sung.
In the high register the head voice, or voice which vibrates in the head cavities, should be used chiefly. The middle register requires palatal resonance, and the first notes of the head register and the last ones of the middle require a judicious blending of both. The middle register can be dragged up to the high notes, but always at the cost first of the beauty of the voice and then of the voice itself, for no organ can stand being used wrongly for a long time.
This is only one of the reasons that so many fine big voices go to pieces long before they should.
In an excess of enthusiasm the young singer attempts to develop the high notes and make them soundin her own ears, at all eventsas big as the middle voice. The pure head tone sounds small and feeble to the singer herself, and she would rather use the chest quality, but the head tone has the piercing, penetrating quality which makes it tell in a big hall, while the middle register, unless used in its right place, makes the voice muffled, heavy and lacking in vibrancy. Though to the singer the tone may seem immense, in reality it lacks resonance.