日本語
Sophia University 
Faculty of Science and Technology 
Department of Information and Communication Sciences 

顔写真 Professor 
Arai Takayuki 

 
My website is here.  

Research background
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) 

Work experience
Oregon Graduate Inst. of Sci. & Tech.  研究員  1995/06/01-1996/12/31 
International Computer Science Institute  研究員  1997/01/01-1998/03/31 

Academic background
Sophia University  Faculty of Science and Engineering  電気・電子工学科  1989/03/31  Graduated 
Sophia University  Graduate School, Division of Science and Engineering  電気・電子工学専攻  Master course  1991/03/31  Completed 
Sophia University  Graduate School, Division of Science and Engineering  電気・電子工学専攻  Doctor course  1994/03/31  Completed 
Oregon Graduate Inst. of Sci. & Tech.  その他(大学院)  Computer Science & Engineeri  Doctor later  1993/08/31  Study Abroad Completed  United States of America 

Academic degrees
工学士  Sophia University  1989/03/31 
工学修士  Sophia University  1991/03/31 
博士(工学)  Sophia University  1994/03/31 

Licenses and qualifications
普通自動車第一種運転免許  1985/10/01 
第一種情報処理技術者  1991/06/01 
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Current state of research and teaching activities
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. 

Research Areas
Perceptual information processing 
Science education 
Rehabilitation science/ Welfare engineering 
Linguistics 
Experimental psychology 

Research keywords
General Acoustics 
Education in Acoustics (including vocal-tract models) 
Acoustic Phonetics 
Speech Science, Hearing Science 
Speech Analysis, Speech Processing, Speech Recognition, Speech Synthesis 
Speech Perception, Psychoacoustics 
Speech and Language Disorders, Hearing Impairment 
Speaker Characteristics of Speech 
Speech Transmission, Speech Intelligibility 

Subject of research
General Acoustics and Education in Acoustics (including vocal-tract models)  Cooperative Research 
Acoustic Phonetics, Applied Linguistics  Cooperative Research 
Speech Science (including speech production), Hearing Science (including speech perception), Cognitive Science  International Joint Research Projects 
Speech Intelligibility, Speech Processing, Speech Emhancement  International Joint Research Projects 
Assistive Technology related to Acoustics, Speech and Acoustics for Everybody  Cooperative Research 
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Proposed theme of joint or funded research
acoustic signal processing  Wish to undertake joint research with industry and other organizations including private sector. 
speech signal processing  Wish to undertake joint research with industry and other organizations including private sector. 
auditory signal processing  Wish to undertake joint research with industry and other organizations including private sector. 
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Research Projects (Competitive Research Funds)
言語聴覚士養成課程における「音響学教育」の現状調査と授業ガイドライン、教材作成  Science research expense  Grant-in-Aid for Scientific Research(C)  2020/04/01-2023/03/31 
博物館・科学館や教育機関等との連携を視野に入れた声道模型を中心とする教材の開発  Science research expense  Grant-in-Aid for Scientific Research(C)  2018/04/01-2021/03/31 
音声生成と音声知覚における喉頭の機構:基本周波数の変動に関する異言語間の研究  Science research expense  Grant-in-Aid for JSPS Fellows  2017/10/13-2020/03/31 
子音を含む音声を生成する声道模型と音響教育への応用  Science research expense  2015/04/01-2018/03/31 
より人間らしい音声に対応した小児・成人の声道模型と音響教育への応用  Science research expense  Grant-in-Aid for Scientific Research(C)  2012/04/01-2015/03/31 
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Bibliography
A Basic Introduction to Speech Perception  ARAI TAKAYUKI  Kaibundo  2003/10 
Introduction to Sound : Acoustics for the Hearing and Speech Sciences  ARAI TAKAYUKI, Sugawara, Tsutomu ; (by)Speaks, Charles E  Kaibundo  2002/11 
Signals and Systems for Speech and Hearing  ARAI TAKAYUKI, Sugawara, Tsutomu ; (tr.by)Imatomi, Setsuko [etc.] ; (by)Rosen, Stuart, Howell, Peter  Kaibundo  1998/08 
The Acoustic Analysis of Speech  ARAI TAKAYUKI, Sugawara, Tsutomu ; (by) Kent, Raymond D, Read, Charles  Kaibundo  1996/05 
Digital Signal and Generalized Functions  Yoshino, Kunio, ARAI TAKAYUKI  Kaibundo  1995/04 
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Papers
Elderly listeners’ identification of Japanese long vowel pair `obasan’ and `obaasan’ using pitch and duration  C. T. J. Hui, T. Arai  Acoust. Sci. Tech.  2019/03 
Evaluation of articulatory similarity using formant and fundamental frequencies during perceptual assimilation of English schwa by native speakers of Japanese  K. Tomaru, T. Arai  Acoust. Sci. Tech.  2019/07 
Plosive (de-) voicing and f0 perturbations in Tokyo Japanese: Positional variation, cue enhancement, and contrast recovery  J. Gao, T. Arai  J. Phon  2019/10 
Categorical perception of Spanish/y/by native speakers of Japanese and subjective evaluation of various realizations of/y/by native speakers of Spanishof /y/ by native speakers of Spanish  T. Kimura, T. Arai  J. Phys. Soc. Japan  2019/08 
Dominance of lower formants of Korean vowels /o/–/u/ in perceptual identification by Seoul dialect listeners  T. Igeta, T. Arai  Acoust. Sci. & Tech.  2019 
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Research presentations
聴覚障がいのある学生の受け入れについて  第6回情報科学技術フォーラム (FIT)  2007/09 
高齢者を対象とした残響環境下における音声定常部抑圧処理の評価実験  電子情報通信学会技術研究報告(Vol.SP2004-154,p.1-6)  2005/05 
Production variation of English schwa and Japanese listeners’ perceptual assimilation pattern of English schwa  The twenty-sixth General Meeting of the Phonetic Society of Japan  2012/09 
ディジタル補聴器のための臨界帯域ごとの周波数圧縮法  日本音響学会講演論文集(Vol.1,p.379-380)  2002/09 
血圧脈波の可聴化  日本音響学会講演論文集(Vol.2,p.1227-1228)  2002/09 
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Intellectual property rights
Patent  声道模型  2015-010496 
Patent  サウンドマスキング装置、方法及びプログラム  2014-048187 
Patent  サウンドマスキング装置、方法及びプログラム  2013-048473 
Patent  声道模型  2013-264444 
Patent  声道模型及びこれを用いた音声生成模型  2006-296936 
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Prizes
Education in Acoustics "Demonstration Award"  2018 
"Show and Tell" Award at INTERSPEECH 2017  2017 
Academic Research Incentive Award  2016 
Academic Research Incentive Award  2015 
Good Practice Award  2015 
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Teaching achievements
音響教育に関する発表  2008/03-2008/03 
音響教育に関する発表  2008/03-2008/03 
音響教育に関する論文  2008/03-2008/03 
音響教育に関する解説論文(招待)  2008/01-2008/01 
音響教育に関する解説論文(招待)  2008/01-2008/01 
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Textbooks and teaching materials
声道模型教材 VTM-10  2001 
ディジタル信号と超関数  1995/04 
音声の音響分析  1996/05 
音声・聴覚のための信号とシステム  1998/08 
音入門 ―聴覚・音声科学のための音響学―  2002/11 
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Social activities
NHK Eテレ「えいごであそぼ with Orton」実験監修  2017/04-Present 
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Memberships of academic societies
IEEE 
Acoustical Society of America 
IEICE 
The Acoustical Society of Japan 
The Phonetic Society of Japan  2001-Present 
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