| Paper Abstract and Keywords |
| Presentation |
2026-01-29 14:00
[Poster Presentation]
Analysis of Articulation through Control of the Vocal Tract Mechanism
Yuta Nagai, Kanji Yamashita, Haruki Fukuyama, Fumiya Kondo, Yuto Okada, Hayata Iizuka, Atushi Nakamura (Shizuoka Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
In recent years, deep learning-based speech synthesis technology has become capable of generating speech with high intelligibility. However, challenges remain in physically reproducing human-like voice quality and timbre. This study developed an air-driven speech robot aimed at mimicking the human vocalization process itself. The system consists of a vocal tract model featuring an exhalation flow device controlled by a stepping motor, a polyimide film-based reed-type artificial vocal fold, and a servo motor-driven tongue mechanism. By varying the thickness of the artificial vocal cords within the range of 50 to 250 µm, speech with a stable fundamental frequency of approximately 100 Hz was achieved using a 150 µm thick reed. Furthermore, by altering the shape of the vocal tract, we attempted to generate the Japanese vowels “a”, “i”, “u”, ‘e’, and “o”, and analyzed the formant frequencies F1 and F2 of the acquired speech. The results showed that the relative formant distribution for each vowel tended to be like that of human speech, but the range of frequency variation was not sufficient. Future work will aim to expand the range of formant variation and achieve speech generation closer to that of humans by improving the vocal tract dimensions and tongue mechanism. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Speaking Robot / Physical Speech Synthesis / Artificial Vocal Fold / Vocal Tract Model / Formant Control / / / |
| Reference Info. |
ITE Tech. Rep., vol. 50, no. 2, IDY2026-4, pp. 13-16, Jan. 2026. |
| Paper # |
IDY2026-4 |
| Date of Issue |
2026-01-22 (IDY) |
| ISSN |
Online edition: ISSN 2424-1970 |
| Download PDF |
|
| Conference Information |
| Committee |
IEICE-EID IDY IEE-EDD SID-JC IEIJ-SSL |
| Conference Date |
2026-01-29 - 2026-01-30 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
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| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
IDY |
| Conference Code |
2026-01-EID-IDY-EDD-JC-SSL |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Analysis of Articulation through Control of the Vocal Tract Mechanism |
| Sub Title (in English) |
|
| Keyword(1) |
Speaking Robot |
| Keyword(2) |
Physical Speech Synthesis |
| Keyword(3) |
Artificial Vocal Fold |
| Keyword(4) |
Vocal Tract Model |
| Keyword(5) |
Formant Control |
| Keyword(6) |
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| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Yuta Nagai |
| 1st Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 2nd Author's Name |
Kanji Yamashita |
| 2nd Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 3rd Author's Name |
Haruki Fukuyama |
| 3rd Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 4th Author's Name |
Fumiya Kondo |
| 4th Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 5th Author's Name |
Yuto Okada |
| 5th Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 6th Author's Name |
Hayata Iizuka |
| 6th Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 7th Author's Name |
Atushi Nakamura |
| 7th Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2026-01-29 14:00:00 |
| Presentation Time |
5 minutes |
| Registration for |
IDY |
| Paper # |
IDY2026-4 |
| Volume (vol) |
vol.50 |
| Number (no) |
no.2 |
| Page |
pp.13-16 |
| #Pages |
4 |
| Date of Issue |
2026-01-22 (IDY) |