Sundberg Johan, Bitelli Maddalena, Holmberg Annika, Laaksonen Ville
Department of Speech Music Hearing, School of Computer Science Communication, KTH, Stockholm, Sweden; Stockholm University College of Music Education, Stockholm, Sweden.
Department of Speech Music Hearing, School of Computer Science Communication, KTH, Stockholm, Sweden; Studio Logopedico Voce e Linguaggio, Imola, Italy.
J Voice. 2017 Sep;31(5):528-535. doi: 10.1016/j.jvoice.2017.02.009. Epub 2017 Mar 27.
"Complete Vocal Technique," or CVT, is an internationally widespread method for teaching voice. It classifies voicing into four types, referred to as "vocal modes," one of which is called "Overdrive." The physiological correlates of these types are unclear. This study presents an attempt to analyze its voice source and formant frequency characteristics. A male and a female expert of CVT sang a set of "Overdrive" and falsetto tones on the syllable /pᴂ/. The voice source could be analyzed by inverse filtering in the case of the male subject. Results showed that subglottal pressure, measured as the oral pressure during /p/ occlusion, was low in falsetto and high in "Overdrive", and it was strongly correlated with each of the voice source parameters. These correlations could be described in terms of equations. The deviations from these equations of the different voice source parameters for the various voice samples suggested that "Overdrive" phonation was produced with stronger vocal fold adduction than the falsetto tones. Further, the subject was also found to tune the first formant to the second partial in "Overdrive" tones. The results support the conclusion that the method used, to compensate for the influence of subglottal pressure on the voice source, seems promising to use for analyses of other CVT vocal modes and also for other types of phonation.
“完全声乐技巧”（CVT）是一种在国际上广泛应用的声乐教学方法。它将发声分为四种类型，称为“声乐模式”，其中一种叫做“过载”。这些类型的生理关联尚不清楚。本研究试图分析其声源和共振峰频率特征。一位男性和一位女性CVT专家在音节/pᴂ/上演唱了一组“过载”和假声音调。在男性受试者的情况下，可以通过逆滤波分析声源。结果表明，以/p/闭塞期间的口腔压力测量的声门下压力，在假声中较低，在“过载”中较高，并且它与每个声源参数都密切相关。这些相关性可以用方程来描述。各种语音样本的不同声源参数与这些方程的偏差表明，“过载”发声比假声音调产生更强的声带内收。此外，还发现受试者在“过载”音调中将第一共振峰调谐到第二谐波。结果支持这样的结论，即所使用的方法，为了补偿声门下压力对声源的影响，似乎有望用于分析其他CVT声乐模式以及其他类型的发声。
