Curriculum Vitaes
Profile Information
- Affiliation
- Professor, Faculty of Science and Technology, Department of Information and Communication Sciences, Sophia University
- Degree
- 工学士(上智大学)工学修士(上智大学)博士（工学）(上智大学)
- Contact information
- arai
sophia.ac.jp - Researcher number
- 80266072
- J-GLOBAL ID
- 200901064275514612
- researchmap Member ID
- 1000260131
Research and professional experience:
2008-present Professor at the Department of Information and Communication Sciences,
Sophia University
2006-2008 Professor at the Department of Electrical
and Electronics Engineering, Sophia University
2003-2004 Visiting Scientist at the Research Lab. of Electronics,
Massachusetts Institute of Technology (Cambridge, MA, USA)
2000-2006 Associate Professor at the Department of Electrical
and Electronics Engineering, Sophia University
1998-2000 Assistant Professor at the Department of Electrical
and Electronics Engineering, Sophia University
1997-1998 Research Fellow at the International Computer Science Institute
/ University of California at Berkeley
(Berkeley, California, USA)
1995-1996 Visiting Scientist at the Department of Electrical Engineering,
Oregon Graduate Institute of Science and Technology
(Portland, Oregon, USA)
1994-1995 Research Associate at the Department of Electrical and
Electronics Engineering, Sophia University
working with Professor Yoshida
1992-1993 Visiting Scientist at the Department of Computer Science
and Engineering, Oregon Graduate Institute of Science and Technology
(Portland, Oregon, USA)
Short-term Visiting Scientist:
2000, August / 2001, August / 2002, August
Massachusetts Institute of Technology (Cambridge, Massachusetts, USA)
2001, March
Max Planck Institute for Psycholinguistics (Nijmegen, the Netherlands)
The series of events involved in speech communication is called “Speech Chain,” and it is a basic concept in the speech and hearing sciences. We focus on research related to speech communication. The fields of this research are wide-ranging, and our interests include the following interdisciplinary areas:
- education in acoustics (e.g., physical models of human vocal tract),
- acoustic phonetics,
- speech and hearing sciences,
- speech production,
- speech analysis and speech synthesis,
- speech signal processing (e.g., speech enhancement),
- speech / language recognition and spoken language processing,
- speech perception and psychoacoustics,
- acoustics for speech disorders,
- speech processing for hearing impaired,
- speaker characteristics in speech, and
- real-time signal processing using DSP processors.
(Subject of research)
General Acoustics and Education in Acoustics (including vocal-tract models)
Acoustic Phonetics, Applied Linguistics
Speech Science (including speech production), Hearing Science (including speech perception), Cognitive Science
Speech Intelligibility, Speech Processing, Speech Emhancement
Assistive Technology related to Acoustics, Speech and Acoustics for Everybody
Speech Processing, Applications related to Acoustics
Speaker Characteristics of Speech
(Proposed theme of joint or funded research)
acoustic signal processing
speech signal processing
auditory signal processing
Research Interests
26Research Areas
9Research History
2-
Jan, 1997 - Mar, 1998
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Jun, 1995 - Dec, 1996
Awards
21-
Jun, 2025
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Mar, 2025
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Mar, 2025
Papers
612-
Proc. of the RISP International Workshop on Nonlinear Circuit and Signal Processing (NCSP), 407-410, Mar, 2004
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Proc. of the RISP International Workshop on Nonlinear Circuit and Signal Processing (NCSP), 395-398, Mar, 2004
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Acoustical Science and Technology, 25(1) 66-69, Jan, 2004
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Acoustical Science and Technology, 25(1) 64-65, Jan, 2004
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Acoustical Science and Technology, 25(1) 61-63, Jan, 2004
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Acoustical Science and Technology, 25(1) 58-60, Jan, 2004
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Proc. of the Eighth Australian and New Zealand Intelligent Information Systems Conference (ANZIIS), 361-366, Dec, 2003
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Proc. of the 8th European Conf. on Speech Communication and Technology, 1365-1368, Sep, 2003
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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E86A(9) 2294-2302, Sep, 2003
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Proc. of the XV International Congress of Phonetic Sciences, 1 317-320, Aug, 2003
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Proc. of the XV International Congress of Phonetic Sciences, 1 305-308, Aug, 2003
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IEICE technical report. Speech, 103(219) 1-5, Jul, 2003Formerly, we proposed several mechanical models of the human vocal tract for education in Acoustics. The characteristics of the models were examined, and their outputs were analyzed and compared with acoustic theory. We used the models during lectures and confirmed their effectiveness for education in Acoustics. Subsequently, we formed a new model for nasalized vowels by attaching a side branch to the oral cavity of one of the former models. In this study, we introduce and examine the characteristics of a new set of models with a nasal cavity (and sinuses) and a large velopharyngeal opening simulating the cleft palate.
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聴覚研究会資料 = Proceedings of the auditory research meeting, 33(4) 317-322, Jun 26, 2003
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Sophia Linguistica, (50) 221-233, 2003
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LACUS Forum XXIX: Linguistics and the Real World, 29 259-269, 2003
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2003 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL II, PROCEEDINGS, 2 197-200, 2003
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Japan Journal of Logopedics and Phoniatrics, 44(4) 304-314, 2003
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Proc. of the First Pan-American/Iberian Meeting on Acoustics, Dec, 2002
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Proc. of the First Pan-American/Iberian Meeting on Acoustics, Dec, 2002
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IEICE technical report. Speech, 102(432) 13-16, Nov, 2002
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Proc. 2002' China-Japan Joint Conference on Acoustics, 199-202, Nov, 2002
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Proc. 2002' China-Japan Joint Conference on Acoustics, 191-194, Nov, 2002
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Proc. 2002' China-Japan Joint Conference on Acoustics, 163-166, Nov, 2002
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Proc. 2002' China-Japan Joint Conference on Acoustics, 159-162, Nov, 2002
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IEICE technical report. Speech, 102(418) 27-32, Oct, 2002An education tool with an animated talking agent named Baldi, that has been developed at CSLU (Center for Spoken Language Understanding at the Oregon Graduate Institute) is used at Tucker-Maxon (Portland, Oregon), a school for deaf children using oral language. Tutors like the CSLU Toolkit have not been used in Japan. In order to create a Japanese language animated agent, we have tried to map visemes of Mexican Spanish phonemes to the corresponding visemes of the Japanese phonemes. In this report, we proposed the ways in which these resources can be used effectively in Japan. We focused on the following areas : (1) We can obtain not only audible information but also visible information from an animated talking agent : (2) By combining an animated talking agent, speech synthesis, speech recognition, and images, we can make any kind of tutor with the CSLU Toolkit. The result of the examination showed that the CSLU Toolkit could be effective for training pronunciation, speech reading, and the acquisition of vocabulary in Japan if there were a Japanese voice, text to speech system, speech recognition and facial animation in Japanese within the CSLU Toolkit.
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IEICE technical report. Speech, 102(417) 41-45, Oct, 2002In this paper, a novel algorithm for digital hearing aids was proposed, which considering the feature of the wider auditory filter of hearing impaired people. We have focused on this wider auditory filter shape and developed a method in which the critical band is compressed along the frequency axis. This algorithm is implemented by two approaches: the Filterbank (FB)-based approach and the FFT-based approach. To evaluate this algorithm, two experiments were conducted: articulation test for Experiment 1, and MOS evaluation for Experiment 2. As the results of the experiments, these results show the feasibility of frequency compression algorithm for the hearing impaired people.
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2002 international symposium on nonlinear theory and its applications., 411-414, Oct, 2002
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2002 international symposium on nonlinear theory and its applications., 379-382, Oct, 2002
Misc.
72-
The Journal of the Institute of Noise Control Engineering of Japan, 48(1) 23-28, Feb, 2024
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日本音響学会研究発表会講演論文集(CD-ROM), 2024, 2024
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J. Acoust. Soc. Jpn., 78(4) 170-175, Apr, 2022
Books and Other Publications
24Presentations
245-
Proc. Spring Meet. Acoust. Soc. Jpn., Mar, 2025
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Proc. Spring Meet. Acoust. Soc. Jpn., Mar, 2025
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Proc. Spring Meet. Acoust. Soc. Jpn., Mar, 2025
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Proc. Spring Meet. Acoust. Soc. Jpn., Mar, 2025
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Proc. Spring Meet. Acoust. Soc. Jpn., Mar, 2025
Professional Memberships
12Works
11Research Projects
38-
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2024 - Mar, 2027
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科学研究費助成事業, 日本学術振興会, Apr, 2024 - Mar, 2027
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2024
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科学研究費助成事業, 日本学術振興会, Apr, 2020 - Mar, 2024
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Research in Priority Areas, Sophia University, Apr, 2020 - Mar, 2023
Industrial Property Rights
10Academic Activities
1Social Activities
1Other
56-
Apr, 2006 - Jun, 2008英語によるプレゼンテーションを学ぶ講義の中で、自分のプレゼンテーションを客観的に学生に示すため、発表風景をビデオに収め、後で学生にそれを見て自己評価させるようにしている。また、同内容で2回目のプレゼンテーションを行わせ、改善する努力を促す工夫もしている。
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2003 - Jun, 2008音響教育に関する委員会の委員を務め、教育セッション（例えば2006年12月に行われた日米音響学会ジョイント会議における教育セッション）をオーガナイズするなど。
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2003 - Jun, 2008音響教育に関する委員会の委員を務め、教育セッション（例えば2004年4月に行われた国際音響学会議における教育セッション）をオーガナイズするなど。特に2005年からは委員長を仰せつかり、精力的に活動している（例えば、2006年10月に国立博物館にて科学教室を開催）。
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Apr, 2002 - Jun, 2008本学に赴任して以来、「Progress Report」と称して研究室の教育研究活動に関する報告書を作成し発行している。これにより、研究室の学生の意識の向上にも役立ち、効果を発揮している。