The mechanism of the human voice

by Emil Behnke

The last thing we have to consider is the "resonator" of the human voice, namely, the upper part of the throat, the mouth, and the nose. Whether we sing ah, ai, ee, o, or oo, the original tone produced by the vibrations of the vocal ligaments is in either case absolutely the same, and it takes the form of one vowel or another, solely according to the shape which the "resonator" assumes, and which may be described as a mould into which the tone is cast. The quality of the voice also—its throatiness, its nasal twang, its shrillness, harshness, and ugliness, or its purity, roundness, fulness, and beauty—depend mainly upon the nature of the resonator, and upon the way in which we work it. It is, therefore, a matter of the highest importance to be fully acquainted with this part of the vocal apparatus, and I hope my readers will follow me in a brief consideration of it with the more pleasure, as we are now speaking of parts which are directly under the control of our will, and upon the proper management of which so much depends.

There is a most able, most painstaking, and most instructive work upon this subject, "Pronunciation for Singers," by Alexander Ellis, Esq., F.R.S., &c., published by J. Curwen and Sons, to which I would call the attention of all who desire to make the best use of their voices. To be really understood this book requires that the student should conscientiously carry out all the experiments Mr. Ellis suggests. But any one doing so will, I venture to assert, rise from the study of this subject with a deeper conviction of the immense importance of the "resonator," and with a clearer perception of the best way of managing it than he ever had before. I obtain better and quicker results with my pupils since I have learnt the lessons Mr. Ellis teaches, and I have no doubt my fellow teachers will derive similar benefit from their study.

One of the few points upon which "doctors" do not differ is that the tone, in order to be pure, resonant, and far-reaching, must be allowed to come well to the front of the mouth. It should, as the phrase goes, be directed against the hard palate just above the front teeth. But this is an unfortunate way of putting it, as the tone fills the whole cavity of the mouth, and cannot be "directed" like a jet of water upon any given point. Nevertheless the idea sought to be conveyed by the injunction is good, for it is certainly essential to good quality that the tone should be brought well forward in the mouth. This is frequently prevented by several circumstances which we will now consider:—

The "soft palate" may be in the way. This is the movable partition shaped like an arch with the little pendant called the "uvula" hanging down in the centre. It acts like a curtain. If we lower it, it hangs upon the back of the tongue, shutting off the mouth from the throat, thereby compelling the tone to pass through the nostrils, and thus giving it a nasal quality. This nasal quality increases the more the passages through which the tone has to travel are impeded; but the first and indispensable condition for its existence is the lowering of the soft palate. Raise this, and you may completely shut the nostrils and yet produce a pure vocal tone. The reason is that, with the soft palate up, the nose is shut off from the throat, thereby compelling the tone to pass through the mouth.

But more, the soft palate is never still for a moment while we are singing or speaking, as it assumes a different degree of tension for every vowel and also for every pitch of the voice. We see, therefore, that this curtain has great influence upon the management of the voice, and we should do all we can to get it under our control. In order to accomplish this, arrange a mirror so that you get the light reflected upon the back of your throat without bending the head, stretching the neck, or otherwise assuming an awkward position. I recommend reflected instead of direct light, because with the latter it is almost impossible to get a perfect sight of the soft palate without making any contortions, and these, however slight, are fatal to success. The management of the light will, no doubt, offer a little difficulty to those not practised in these matters, but once made it is easily rearranged, and the gain is great.

The mirror mentioned above is to throw the light into your mouth; you will require another one in which to see the image. Now try the following: Open your mouth and breath through the nostrils; the soft palate will immediately drop upon the tongue. Sing while it is in this position, and you will produce nasal tone. Now breathe through the mouth, and the soft palate will rise. Raise it higher still, by attempting to yawn, till the uvula almost disappears. Sing again with the soft palate in this position, and if nothing else interferes you will produce pure vocal tone. If you sing up and down the scale you will perceive that the soft palate to some extent rises and falls with the pitch of your tones. You will also notice that the tension of it increases as you approach the the limit of one register, and that it diminishes as soon as you change into the next register above. All these things, and a great many besides, you will notice if you observe carefully, and by a little steady practice you will acquire easy control over the movements of your soft palate, the beneficial results of which will soon be manifested in the improved quality and the better management of your voice.

This leads me to remark that the soft palate should, as a matter of course, be in a perfectly healthy condition, or it cannot perform the infinite variety of movements required from it. In many cases however, it is in a very different state, the arch being congested, the uvula elongated, and the tonsils greatly enlarged. People with a soft palate like this are handicapped. They might as well try to run a race with a heavy weight on their shoulders as to sing or speak with such impediments in their throats. They should at once put themselves in the hands of a properly qualified medical practitioner, who may probably recommend clipping of the uvula or excision of the tonsils. Either operation is a slight one, and in suitable cases nothing but good can follow from it.

Another obstacle to the forward production of tone is often caused by that great movable plug called the tongue. We have it on the highest authority that the tongue is an "unruly member." It is sometimes difficult to keep it under proper control, and with some people it is continually running away altogether. As under ordinary circumstances, so in singing. Instead of peacefully assuming the position necessary for the production of the various vowels, the tongue rises in rebellion; it arches up, stiffens and defies all attempts to keep it in order. The tone is consequently more or less impeded and shut in, with the result of making it guttural or throaty. Here again singing before the mirror as described above will enable the student to master his tongue and to improve his voice to a wonderful extent. All voice trainers, as I have said before, agree that tone should be allowed to come well forward, and the best plan to bring about this desirable end is to sing oo, then to allow oo to dwindle into o, and finally to allow o to dwindle into ah.

In some cases these oo-o-ah exercises are insufficient because the throatiness of tone is partly brought about by a stiffening of the throat in general. The oo-o-ah must then be preceded by staccato exercises upon the syllable Koo, which have the effect not only of throwing the tone forward, but also of making the throat supple. Make the experiment before a mirror and you will see the reason.

I should have pointed out in the course of this chapter that one of the great secrets in the production of fine resonant and far-reaching tone consists in using as little air as possible; and I conclude by advising all those who want to be heard to open their mouths, a thing which, curiously enough, many people in these islands seem to be determined not to do.