How does the brain restore missing speech information?
| Project/Area Number |
17K18705
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Psychology and related fields
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| Research Institution | Kyushu University |
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Principal Investigator |
Ueda Kazuo 九州大学, 芸術工学研究院, 准教授 (80254316)
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| Co-Investigator(Kenkyū-buntansha) |
Remijn GerardB. 九州大学, 芸術工学研究院, 准教授 (40467098)
中島 祥好 九州大学, 芸術工学研究院, 教授 (90127267)
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| Project Period (FY) |
2017-06-30 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 劣化音声知覚 / 音声修復 / 連続聴錯覚 / 局部時間反転音声 / 断続音声 / 音韻修復 / 実験系心理学 / 精神物理学 / 劣化音声 |
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| Outline of Final Research Achievements |
Intelligibility of temporally degraded speech was investigated with locally time-reversed speech (LTR) and its interrupted version (ILTR). Control stimuli comprising interrupted speech (I) were also included. Speech stimuli consisted of 200 Japanese meaningful sentences. In interrupted stimuli, speech segments were alternated with either silent gaps or pink noise bursts. The noise bursts had a level of -10, 0 or +10 dB relative to the speech level. Segment duration varied from 20 to 160 ms for ILTR sentences, but was fixed at 160 ms for I sentences. At segment durations of 40 and 80 ms, severe reductions in intelligibility were observed for ILTR sentences, compared with LTR sentences. A substantial improvement in intelligibility (30-33%) was observed when 40-ms silent gaps in ILTR were replaced with 0- and +10 dB noise. Noise with a level of -10-dB had no effect on the intelligibility.
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| Academic Significance and Societal Importance of the Research Achievements |
音声を用いたコミュニケーションは，日常生活においては他の音声や音声以外の音が存在する中で行われることが普通である。そのような環境では，音声は他の音によって遮られたり，残響の影響を受けたりするが，それでも音声知覚は正常に行われている。本研究で行われた劣化音声の知覚に関する研究は，どのような劣化条件で知覚的修復が行われるのかを明らかにしたものである。音声知覚の仕組みを解明するという学術的意義に加えて，日常生活で用いられる人工内耳が満たすべき要件，あるいは限られた情報量で音声を伝送するための要件を明らかにする，という社会的意義がある。
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Report
(4 results)
Research Products
(55 results)
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[Journal Article] How sonority appears in speech analyses2018
Author(s)
Nakajima Yoshitaka、Ueda Kazuo、Remijn Gerard B.、Yamashita Yuko、Kishida Takuya
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Journal Title
Acoustical Science and Technology
Volume: 39
Issue: 3
Pages: 179-181
DOI
NAID
ISSN
0369-4232, 1346-3969, 1347-5177
Year and Date
2018-05-01
Related Report
Open Access / Int'l Joint Research
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[Journal Article] A NIRS study on cortical hemodynamic responses to normal and whispered speech in 3- to 7-year-old children2017
Author(s)
Remijn, G.B., Kikuchi, M., Shitamichi, K., Ueno, S., Yoshimura, Y., Tsubokawa, T., Kojima, H., Higashida, H., Minabe, Y.
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Journal Title
Journal of Speech, Language and Hearing Research
Volume: 60
Pages: 465-470
Related Report
Peer Reviewed
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