[CHAPTER VII.]
SOUND—THE LARYNGOSCOPE—THE LARYNX RECONSIDERED.
Some study of physics desirable—Sound and vibrations—The sounding body—Experiments to illustrate the principles of sound—Qualities of sound—Animals and perception of sound—The range of hearing in man—The larynx as a musical instrument—Experiments of Johannes Müller—Discovery of the laryngoscope by Garcia—Description of the instrument—Method of using the laryngoscope—The difficulties—Auto-laryngoscopy—The importance of both laryngoscopy and auto-laryngoscopy—Change in size of the larynx due to use—Delicate changes in the laryngeal mechanism—Changes in the larynx during adolescence—Warnings—The "breaking" of the voice—Analogies with fatigue, etc.—When should singing be begun?—Singing with others—Choral singing [97]
[CHAPTER VIII.]
FURTHER CONSIDERATION OF BREATHING, LARYNGEAL ADJUSTMENT, ETC.
Various kinds of breathing, as "abdominal," "clavicular," etc., discussed—Control of the whole of the breathing mechanism urged—Correct breathing as a habit—Breathing in the most vigorous speaking and singing—Different views expressed by a diagram—Economy of energy in art—Reserve energy in breathing—"Pumping"—Coup de glotte—"Attack"—Breath-adjustment—Quality of sound the prime consideration in tone-production—Tremolo and other faults—Tests of good breathing—Mouth-breathing—Exercises—Singing of a single tone—Its relation to scale-singing—Summary and review [118]
[CHAPTER IX.]
THE RESONANCE-CHAMBERS.
Vocal bands and resonance-chambers compared—Improvised mechanism to illustrate resonance—Musical instruments as resonance-bodies—A vowel in relation to the resonance-chambers—Description of the resonance-chambers—How the quality of tones may be made to vary—New views as to the sounding-chambers—Summary [140]