An analysis by synthesis paradigm was implemented to model glottal airflow and vocal tract acoustics for the falsetto phonation of a trained countertenor. Changes in vocal intensity were measured as a function of subglottal pressure, open quotient of the time-varying glottal airflow pulse, and formant tuning. The contributions of laryngeal adduction (open quotient of the glottal flow pulse) and of formant tuning to intensity change were derived from modeled data. The findings were: (1) Subglottal pressure accounted for almost 90% of the variation in SPL in falsetto phonation. (2) The open quotient of the glottal flow pulse was remarkably constant in these falsetto phonations, and thus did not affect vocal intensity significantly. (3) Formant tuning occurred in two out of nine possibilities for the vowel/a/. These instances did not support the concept of systematic exploitation of formant tuning.
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机译：进行了综合范式分析，以模拟声门气流和声道声学，以训练受过训练的男高音的假音。声音强度的变化是声门下压力，声门气流脉冲随时间变化的开放商和共振峰调谐的函数。喉内收的贡献（声门血流脉冲的开放商）和共振峰对强度变化的调节均来自建模数据。研究结果是：（1）声门下声压下声门下压力几乎占SPL变化的90％。 （2）在这些假声发声中，声门血流脉冲的开放商是非常恒定的，因此对声强没有明显的影响。 （3）元音/ a /的九种可能性中有两种发生了共振峰调整。这些实例不支持共振峰调谐的系统开发概念。
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