A New Approach to Measure Vocal Tract Resonances. Application to a Modern Singing Study
| Autor: | Maison, Timothée, Silva, Fabrice, Guillemain, Philippe, Henrich Bernardoni, Nathalie |
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| Přispěvatelé: | Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), GIPSA - Analyse et Modification de l'homme en mouvement : biomécanique, cognition, vocologie (GIPSA-MOVE), GIPSA Pôle Sciences des Données (GIPSA-PSD), Grenoble Images Parole Signal Automatique (GIPSA-lab), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Grenoble Alpes (UGA) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | PEVoC 2022-14th Pan-European Voice Conference PEVoC 2022-14th Pan-European Voice Conference, Aug 2022, Tallinn, Estonia |
| Popis: | International audience; Measuring vocal-tract acoustics is one key issue for singing voice characterization. We aim at developing a non-invasive experimental tool that would assess the singer's vocal-tract acoustical behavior during singing. Grounded on previous impedance measurements, a broadband external acoustic source (chirp signal) loads vocal tract at the lips while phonating. Both chirp and voice signals are recorded by a microphone. An open-mouth condition measurement calibrated by a closed-mouth condition provides vocal-tract frequency response, from which resonance frequencies and quality factors can be estimated. A challenging aspect is to separate voice from chirp signal. We propose a new method for signal separation and test it numerically. Its applicability to real singing is then explored on vowels sung by a modern-style singer.First step consists in estimating voice fundamental frequency on recorded voice+chirp signal. Secondly, an informed high-order chirplet analysis is performed on this signal to eliminate voice, recovering only modulated chirp. Numerical simulations, based on synthesizing vowel [a] sung at 450Hz while adding a 3dB-lower chirp, show that the method is accurate enough for resonance frequencies (resp. quality factors) not to deviate by less than 3 cents (resp. 5%).The method is applied on recordings of a modern singer and singing teacher. The subject was asked to sing vowel [a] with different voice qualities and for several pitches (F3, G3, A3). Measurement was done during a one-second sustained phonation (voice condition) and during a following closed-glottis condition with instruction to keep vocal tract in same position (silence condition). Voice condition forces to apply voice-chirp separation method, on contrary to silence condition. Results show that the closed-glottis instruction causes additional vocal tract adjustments, even for a trained singer. The differences in resonances between registers are explored as a function of pitch and voice quality. |
| Databáze: | OpenAIRE |
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