True Vocal Folds: Body-Cover Control: The 'body-cover theory' of vocal fold structure was introduced by Hirano in 1977.[38] This figure demonstrates the controlled use of the vocal folds in four body-cover configurations: on the thick edge, on the thin edge, in a stiff mode, or in a slack mode.[29][8][39] These body-cover configurations change or modify the vibratory modes of the true vocal folds and, within the dynamical system of the human voice, effect the intensity of the sound produced and contribute to what are commonly labeled as the different human vocal registers.[40] This figure was formerly known as vocal fold mass.[7][2]
PDF The Estill Voice Model Theory And 54
Torso Control: Torso anchoring stabilises the body and breath.[53][54] Gillyanne Kayes writes, 'Techniques for anchoring the tone have been described over the centuries by singers and teachers under a variety of names: support, singing from the back, singing from the neck, appoggiare, rooting, grounding and connecting the voice. In the Estill training model, I believe these techniques have been correctly identified as postural anchoring.'[55]
Herzel, H, Berry, D, Titze, IR, and Steinecke, I. "Nonlinear dynamics of the voice: signal analysis and biomechanical modeling." Chaos: An Interdisciplinary Journal of Nonlinear Science 5, no. 1 (1995): 30-34. ABSTRACT
Maxfield, L, "Application of principles from motor-learning theory to the studio voice lesson: effects of feedback frequency on retention of classical singing technique." PhD (Doctor of Philosophy) thesis, University of Iowa, 2011.
Smith, SL, Maxfield, L, and Hunter, EJ, "Sensitivity analysis of muscle mechanics-based voice simulator to determine gender-specific speech characteristics," Biomechanics and modeling in mechanobiology 18, no. 2 (2019): 453-462. 2ff7e9595c
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