An experimental study of acoustic characteristics of hypopharyngeal cavities using vocal tract solid models

[摘要] References(8)Cited-By(2)Solid models of the vocal tract with hypopharyngeal cavities were molded with a stereolithographic technique based on MRI data obtained from a male speaker during the production of Japanese vowels /a/ and /o/. A vowel synthesis experiment conducted with the models revealed a relatively good agreement in the second and third formants, as well as in anti-resonance at 4–5 kHz. The elimination of the models’ piriform fossa resulted in the disappearance of the anti-resonance and shifts of the adjacent formants. The modification of the laryngeal cavity into a uniform tube caused spectral changes in the frequency range of 1.5–7.0 kHz. These acoustic effects of hypopharyngeal cavities were dependent on vocal tract shapes.

[学科分类] 声学和超声波

[关键词] Vocal tract model;MRI;Hypopharynx;Piriform fossa;Laryngeal cavity