Resonance in Singing and Speaking | Page 4

pairs to the right and left of the centre of the face. The location of the maxillary sinuses within the maxillary or cheek bones cannot be shown in this drawing.
The dark shading represents the cavities of the throat, nose, and head. The relations of the parts are shown more accurately than is possible in any diagram. It will be noticed that the vibrations from the larynx would pass directly behind the soft palate into the nasal chamber, and very directly into the mouth. The nasal roof is formed by two bones situated between the eyes; the sphenoid or wedge-bone, which is connected with all other bones of the head, and the ethmoid or sieve-like bone. The structure of these two bones, especially of the ethmoid, consists of very thin plates or lamin?, forming a mass of air cavities which communicate by small openings with the nasal cavity below. Thus, the vibrations in the nose are transmitted to the air spaces above, and the effective qualities of the head vibrations are added to the tone.
THE LARYNX
The larynx or voice-box contains the vocal cords. Just above the vocal cords on each side is a large, deep cavity, called the ventricle. These cavities reinforce the primary vibrations set up by the cords and serve to increase their intensity as they are projected from the larynx. The larynx is the vibrating organ of the voice. It is situated at the base of the tongue and is so closely connected with it by attachment to the hyoid bone, to which the tongue is also attached, that it is capable of only slight movement independent of that organ; consequently it must move with the tongue in articulation. The interior muscles of the larynx vary the position of its walls, thus regulating the proximity and tension of the vocal cords. The male larynx is the larger and shows the Adam's apple. In both sexes the larynx of the low voice, alto or bass, is larger than that of the high voice, soprano or tenor. The larynx and tongue should not rise with the pitch of the voice, but drop naturally with the lower jaw as the mouth opens in ascending the scale. The proper position of the tongue will insure a proper position for the larynx. The less attention the larynx receives the better.
THE VOCAL CORDS
The vocal cords are neither cords nor bands, but instead are thick portions of membrane extending across the inner surface of the larynx. On account of familiarity the name vocal cords will still be used. They are fairly well represented by the lips of the cornet player when placed on the mouthpiece of the instrument. The pitch of the tone is fixed by the tension of the vocal cords and the width and length of the opening between them. Their tension and proximity are self-adjusted to produce the proper pitch without any conscious volition of the singer. They can have no special training, needing only to be left alone. The work of the vocal cords, though essentially important, is, when naturally performed, light and consequently not exhausting. If the larynx and all of its supporting muscles are relaxed as they are in free and easy breathing, then when the air passes out through the larynx, the vocal cords will automatically assume a tension sufficient to vocalize the breath and give the note the proper pitch. The normal action of the cords will never cause hoarseness or discomfort. The sound should seem to be formed, not in the throat,--thus involving the vocal cords,--but in the resonance chambers.
THE EPIGLOTTIS
The epiglottis is the valve which closes over the upper opening of the larynx. It not only closes the mouth of the larynx when food is swallowed, but aids materially in converting into tone the vibrations set up by the vocal cords.
THE PHARYNX
The pharynx extends from the larynx to the nasal cavity. The size of the opening into the nasal chamber is controlled by the soft palate and is frequently entirely closed. The size of the pharynx is varied by the contraction and relaxation of the circular muscles in its tissue; when swallowing its walls are in contact. The pharynx acts as does the expanding tube of brass instruments. It increases the force and depth of the tone waves. The wider the pharynx is opened, without constraint, the fuller the resonance and the better the tone.
THE UNDER JAW
The under jaw furnishes attachment for the muscles of the tongue and hyoid or tongue bone. It also controls, owing to the connections of the larynx with the hyoid bone, the muscles that fix the position of the larynx.
The pterygoid muscles, which move the under jaw forward and backward, do not connect with the larynx, so their action does not compress that organ or in any way impede the