The advantages of using the Radioear Bone Vibrator as an artificial larynx is that all kinds of vibration can be played into the throat and the treatment of all types of vibration by the throat can be better understood.
1. A “raspberry” vibration slower than pitch played into the throat will give vowel pitch without harmonics.
2. When there is a “raspberry” of sufficient frequency to make a pitch the vowels will be heard on harmonics.
3. A pure tone will reverberate harmonics even though it is basically all fundamental.
4. A balloon burst played into the throat will show vowel pitch of all vowels and, on the open vowels especially, the 3,000Hz.
5. Esophageal vibration by a person with a larynx played into the throat will show vowel pitch and 3,000Hz on the open vowels. It remains to be seen if this is also true of a person who has had his larynx removed.
6. Brass vibration, flute vibration, and reed vibrations or mixtures can be studied by the stops of an electric organ of by the real instruments. The immediate feedback
of sounds is of great value in learning.
7. Singing on any of the vowel colors which reinforce fundamental vibration will give the loudest resonance, liquid vibrato, and focus.
After our observations of the vocal tract by artificial vibration, we will state that the extension of range in the singing voice is made possible by the development of registers, and that registers are due to the effect of the vibrating air mass in the resonating vocal tract upon the vibration of the vocal cords.
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