tubes understand this. Neither is it necessary that the vibrations should be transmitted to the head cavities by way of the pharynx and over the soft palate. They may be transmitted through the bones of the head. John Howard proved this, to his satisfaction at least, many years ago.
I recall that in working with Emil Behnke he used an exercise to raise the soft palate and completely close the channel, yet no one can deny that his pupils had head resonance. There are certain facts in connection with this that are hard to side-step. Plunket Greene once told me that at one time he lost the resonance in the upper part of his voice, and on consulting a specialist he found a considerable growth on the septum. He had it removed and at once the resonance returned. Other equally strong arguments could be offered in support of the claim that the head cavities do act as resonators. At any rate the high or low palate is not the deciding factor.
Too much cannot be said on the subject of interference, or resistance. So long as there is any of it in evidence it has its effect on tone quality. It is the result of tension, and tension is a mental impulse of a certain kind. Its antidote is relaxation, which is a mental impulse of an opposite nature. It is necessary for most singers to work at this until long after they think they have it.
In preparing the head voice the student must begin with a tone that is entirely free from resistance and build from that. In a large majority of voices it means practicing with a light, soft tone. A voice that cannot sing softly is not rightly produced. While the student is working for the freedom which will give him a good half voice he is preparing the conditions for a good full voice. The conditions are not right for the practice of full voice until the last vestige of resistance has disappeared. The light voice is as necessary to artistic success as the full voice. The singer must have both, but he must never sacrifice quality for power.
In the female voice the readjustments of the mechanism known as changes of register usually occur at about [Illustration: Figure B].
In many lyric soprano voices I have found the same readjustment at the B and C above the staff [Illustration: Figure C].
I have also noted in many bass voices a similar change of adjustment at the E and F below the bass clef [Illustration: Figure D].
It would seem therefore, that in a majority of voices until an even scale has been developed, that these readjustments appear at about the E and F and B and C throughout the vocal compass. The exceptions to this rule are so numerous however, that it can scarcely be called a rule. Some voices will have but one noticeable readjustment, and it may be any one of the three.
In some voices the changes are all imperceptible. In others, due to wrong usage, they are abrupt breaks. In every instance the teacher must give the voice what it needs to perfect an even scale. There should be no more evidence of register changes in the vocal scale than in the piano scale.
Leaving the lower two changes for the moment, let us consider the one at the upper E and F. This one is so common among sopranos that there are few who have not one, two, or three weak tones at this point. To avoid these weak tones many are taught to carry the thicker tones of the middle register up as far as they can force them in order to get the "big tone" which seems to be the sole aim of much modern voice teaching. The victims of this manner of teaching never use the real head voice, and one thing happens to them all. As time goes on the upper voice grows more and more difficult, the high tones disappear one by one, and at the time when they should be doing their best singing they find themselves vocal wrecks. Some of them change from soprano to alto and end by that route.
Now these are not instances that appear at long intervals. They are in constant evidence and the number is surprisingly large. The cause is ignorance of how to treat the upper voice, together with an insane desire for a "big tone" and a lack of patience to await until it grows. The incredible thing is that there is a teacher living whose ear will tolerate such a thing.
Now there is a way to develop the head voice that gives the singer not only the full power of his upper voice, but makes it free, flexible and vibrant, a sympathetic quality, a
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