Most of the throat troubles of singers are directly caused by throat stiffness and muscular strain. Dr. Mills, among others, touches on this fact. "All the author's experience as a laryngologist tended to convince him that most of those evils from which speakers and singers suffer, whatever the part of the vocal mechanism affected, arise from faulty methods of voice production, or excess in the use of methods in themselves correct." (Voice Production in Singing and Speaking, Phila., 1906.)
For the purposes of artistic singing, a voice loses all its value when the injurious effects of throat stiffness become very pronounced. On this account singers are obliged to give up appearing in public before the condition reaches the extreme. It follows therefore that only in the case of public speakers do we see the extreme results of persistence in the wrong use of the voice. "Clergyman's sore throat" is the name usually applied to this condition. The sustained use of the voice, under conditions of extreme strain, is exceedingly painful both to the speaker and to the hearer.
Singers are usually unconscious of throat stiffness unless the condition be very pronounced. Neither the sense of hearing nor the muscular sense informs the singer of the state of tension. Accustomed to the sound of his own voice, the singer may be unaware of a throaty or nasal quality which he would instantly detect in another voice. This is also true of the muscular sensations of tone-production; habit makes the singer inattentive to the sensations caused by throat tension.
Throat stiffness always tends to become greater in degree; it is a self-aggravating condition. Even though very slight in its beginnings, the state of stiffness obliges the singer to put forth more than the normal effort in order to secure the desired effects. This increase of innervation is not confined to the muscles which need to be more strongly contracted. As Prof. Scripture points out, it also extends to the associated and antagonist muscles, that is, to all the muscles of the throat. Thus the stiffness is increased in degree. Still greater exertion is then required, resulting in still greater stiffness. This may go on for years, the voice gradually becoming less responsive to the demands of the singer.
Individual personal characteristics are an important factor in determining a singer's experience with throat stiffness. Some singers are so fortunately constituted as to be almost entirely free from the tendency to stiffen the throat. Others detect the tendency in its beginning and find no difficulty in correcting it. Still others habituate themselves to some manner of tone-production, and neither increase nor diminish the degree of stiffness. Even under modern methods of instruction, many artists are correctly trained from the start and so never stiffen their throats in any way.
Several traits of character are concerned in determining the individual tendency to throat stiffness. Nervous temperament, keenness of ear, artistic and musical endowment, each has its influence in this connection.
The great prevalence of throat stiffness among present-day singers is due primarily to the idea of mechanical vocal management as the basis of instruction in singing. Not only are modern methods intrinsically worthless, in that a correct use of the voice cannot be attained by the application of mechanical rules. Worse than this, the means used for training the voice are such as to defeat their own purpose. At every instant of instruction the student's attention is expressly turned to the vocal organs and to the mechanical operations of the voice. The only possible result of this kind of vocal instruction is to stiffen the throat and so to render the correct vocal action an impossibility.
A peculiar contradiction is presented by the modern vocal teacher; his artistic conception of singing is utterly at variance with his ideas of mechanical tone-production. It may safely be said that the vast majority of vocal teachers are thoroughly conversant with the highest standards of artistic singing. They know what effects their pupils ought to obtain. But the means they use for enabling the pupils to get these effects have exactly the contrary result. When the student tries to open the throat this obstinate organ only closes the tighter. Attempting to correct a tremolo by "holding the throat steady" causes the throat to tremble all the more.
Modern voice culture, in its practical aspect, is a struggle with throat stiffness. Everything the student does, for the purpose of acquiring direct command of the voice, has some influence in causing the throat to stiffen. Telling the student to hold the throat relaxed seldom effects a cure; this direction includes a primary cause of tension,—the turning of attention to the throat. All the teacher can do to counteract the stiffening influence is to give relaxing exercises. These are in most cases efficacious so long as constructive instruction is abandoned, and the relaxing of the throat is made the sole purpose of study. But soon after positive instruction is resumed the tendency to stiffen reappears. As lesson follows after lesson, the stiffness becomes gradually, imperceptibly more pronounced. At length the time again comes for relaxing exercises.
A single repetition of this process, relaxing the throat and then stiffening it again, may extend over several months of study. During this time the student naturally learns a great deal about music and the artistic side of singing, and also improves the keenness of the sense of hearing. This artistic development is necessarily reflected in the voice so soon as the throat is again relaxed.