A simplified vocal tract model for articulation of [s]: The effect of tongue tip elevation on [s]

Autoři: Tsukasa Yoshinaga aff001;  Kazunori Nozaki aff002;  Shigeo Wada aff003
Působiště autorů: Toyohashi University of Technology, Toyohashi, Aichi, Japan aff001;  Osaka University Dental Hospital, Suita, Osaka, Japan aff002;  Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, Japan aff003
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0223382


Fricative consonants are known to be pronounced by controlling turbulent flow inside a vocal tract. In this study, a simplified vocal tract model was proposed to investigate the characteristics of flow and sound during production of the fricative [s] in a word context. By controlling the inlet flow rate and tongue speed, the acoustic characteristics of [s] were reproduced by the model. The measurements with a microphone and a hot-wire anemometer showed that the flow velocity at the teeth gap and far-field sound pressure started oscillating before the tongue reached the /s/ position, and continued during tongue descent. This behaviour was not affected by the changes of the tongue speed. These results indicate that there is a time shift between source generation and tongue movement. This time shift can be a physical constraint in the articulation of words which include /s/. With the proposed model, we could investigate the effects of tongue speed on the flow and sound generation in a parametric way. The proposed methodology is applicable for other phonemes to further explore the aeroacoustics of phonation.

Klíčová slova:

Acoustics – Audio signal processing – Flow rate – Sound pressure – Teeth – Tongue – Velocity – Consonants


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