Vocal Organ.
The organ assumes at birth a form; this form is called the timbre or
tone, This tone corresponds to the constitutional form. Under the sway
of habit, the form assumes an acquired tone which is called emission.
The emissive form corresponds to the habitual tone. Under the sway of
emotion the voice is modulated and assumes forms which we will call
passional or transitory.
The mouth is normal, concentric and eccentric. [See chart in Delaumosne,
page 81.]
From these three types we have succeeded in fixing and classifying
forty-eight million phenomena.
Definition of the Voice.
The voice is the essential element in singing. It is based upon sound.
This is based upon three agents:
The _projective_ agent, or the _lungs_.
The _vibrative_ agent, or the _larnyx_.
The _reverberative_ agent, or the _mouth_.
Each of these agents acts in different ways, nine acts resulting
therefrom, which we will call products of phonetic acts.
The projective agent in its special activities engenders
Intensities,
Shades,
Respirations.
The vibrative agent in its special activities engenders
Prolations,
Pathetic effects,
Registers.
The reverberative agent in its special activities engenders
Emissions,
Articulations,
Vowels.
To recapitulate, the phonetic agents give us nine products; but, when
studied from the vocal point of view, these products become as many
elements and must be examined from the triple point of view of
preparatory, practical and transcendant studies.
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