With so many different quality characteristics associated with the same name, it is evident that the most critical factor in technical development is not the terminology itself, but an ability to make a proper distinction between the tonal product, its name, and the probable mechanical processes that result in its appearance. The vocal mechanism functions under an incredible variety of states and conditions. Some of these sounds represent progressive steps on route to register integration, still others have no redeemable qualities and merit attention only because they are faults to be eliminated.
Discovering how to sort out the differences in treatment necessary to advance from one stage of technical development to another requires a special kind of listening. This places a heavy reliance on an ability to hear functionally, which is quite different from training programs based purely on aesthetic judgment.
That which is perceived as ‘voice’ is merely a perception of moving air, and it is impossible to support either a column of air or the vibrations activated by the vocal folds which have caused that motion. Neither the abdominals nor the diaphragm create, control, or determine the quality of those vibratory patterns. The intrinsic muscles of the larynx, whose role during phonation is to maintain vocal fold tension proportional to the frequency of the vibrations (pitch) being sung, are unaffected by either abdominal or diaphragmatic activity (which is not to deny, however, that such activity should take place reflexively).
Both the abdominals and the diaphragm interact with the larynx, but the abdominals, which can be controlled independently, should hold firmly as a response to a correct technique of singing (i.e., the ability of the laryngeal musculature to coordinate effectively), and not considered a causative factor necessary to the development of vocal skills or something to be acted upon. Moreover, the diaphragm responds reflexively under all conditions and cannot be controlled directly – as is demonstrated when attempts are made to pacify its fluttering movement when under nervous tension.
Efforts made to support the voice and to steady it have neither a positive nor a negative effect on the adjustments made by the supra- and infrahyoids and their ability to stabilize the larynx, preventing it from rising too high or descending into too low a position.
For whatever reason there is an unshakable belief that all will be well technically if the tonal emission is being properly supported, particularly by the work of the diaphragm. While it is undeniable that a vocal mechanism being well used is in a state of equilibrium, and this is an ideal training objective, the fact is Barry Wyke, a British neurologist, has proven this concept of support to be impossible for the following reason: As reported in a lecture delivered during the Eight Symposium Care of the Professional Voice presented by The Voice Foundation (June 1979) Wyke pointed out to the voice professionals present, “In this regard, singing teachers particularly should note that the diaphragm remains relaxed throughout phonation – – and hence does not provide ‘support for the voice’, as is often said.”
Separate and apart from this disclaimer, it is further evident that acoustically, since ‘voice’ is in reality no more than the rhythmic movement of air, attempts made to regulate and overtly control moving air particles to enhance their quality is bound to fail of its purpose.