Sound source locations and their roles in Japanese voiceless "glottal" fricative production.

Autor: Yoshinaga T; Osaka University, 1-3 Machikaneyama, Toyonaka, 560-8531, Japan., Maekawa K; National Institute for Japanese Language and Linguistics, 10-2 Midoricho, Tachikawa, Tokyo 190-8561 Japan., Iida A; Toyohashi University of Technology, 1-1 Hibarigaoka, Toyohashi, Aichi 441-8580 Japan.
Jazyk: angličtina
Zdroj: The Journal of the Acoustical Society of America [J Acoust Soc Am] 2024 Nov 01; Vol. 156 (5), pp. 2935-2948.
DOI: 10.1121/10.0034229
Abstrakt: Although [h] is described as a glottal fricative, it has never been demonstrated whether [h] has its source exclusively at the glottis. In this study, sound source locations and their influence on sound amplitudes were investigated by conducting mechanical experiments and airflow simulations. Vocal tract data of [h] were obtained in three phonemic contexts from two native Japanese subjects using three-dimensional static magnetic resonance imaging (MRI). Acrylic vocal tract replicas were constructed, and the sound was reproduced by supplying airflow to the vocal tracts with adducted or abducted vocal folds. The sound source locations were estimated by solving the Navier-Stokes equations. The results showed that the amplitudes of sounds produced by the vocal tracts with an open glottis were in a similar range (±3 dB) to those with a glottal gap of 3 mm in some contexts. The sound sources in these cases were observed in the pharyngeal cavity or near the soft palate. Similar degrees of oral constrictions were observed in the real-time MRI, indicating that the sound traditionally described as [h] is produced, at least in some contexts, with sound sources of turbulent flow generated by a supralaryngeal constriction of the following vowel.
(© 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).)
Databáze: MEDLINE
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