Research theme for competitive and other funds (8)：
2018 - 2023 Modeling the processing mechanisms of temporal structures in spoken Japanese
2013 - 2018 Mathematical Modeling of Perception and Acquisition of Temporal Aspects of Speech for Second Language Learners
2012 - 2017 Effects of aging on absolute pitch perception: Psychophysical experiments and computational models
2011 - 2016 Quantitative analysis and the modeling of L2 timing control through the comparison with L1 timing characteristics
2011 - 2013 A cross-linguistic study on the psychological reality of prosodic structure in spoken language
2008 - 2012 A Modeling of Prosody Perception for Second Language Learning
2005 - 2008 An experimental study on "Sensitive Period"of foreign speech acquisition
2004 - 2007 Mathematical modeling of the temporal acpects of speech based on human perceptual and cognitive mechanisms
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Papers (20)：
Parham Mokhtari, Hiroaki Kato, Hironori Takemoto, Ryouichi Nishimura, Seigo Enomoto, Seiji Adachi, Tatsuya Kitamura. Further observations on a principal components analysis of head-related transfer functions. Scientific Reports. 2019. 9. 7477
Yanlong Zhang, Hiroaki Kato, Mee Sonu, Yoshinori Sagisaka. L2 speech timing analysis based on L1 timing characteristics. 2016 Conference of the Oriental Chapter of International Committee for Coordination and Standardization of Speech Databases and Assessment Techniques, O-COCOSDA 2016. 2017. 227-231
Hironori Takemoto, Parham Mokhtari, Hiroaki Kato, Ryouichi Nishimura, Kazuhiro Iida. A dipole model for estimating frequency versus elevation-angle trajectory of the first spectral notch of head-related transfer functions in the median plane. The Journal of the Acoustical Society of America. 2016. 140. 4. 2957-2957
Yanlong Zhang, Mee Sonu, Hiroaki Kato, Yoshinori Sagisaka. Analysis on L2 learners' perception errors between geminate and singleton of Japanese consonants using loudness related parameters. 2015 International Conference Oriental COCOSDA held jointly with 2015 Conference on Asian Spoken Language Research and Evaluation (O-COCOSDA/CASLRE), Shanghai, China, October 28-30, 2015. 2015. 186-189
Mee Sonu, Takayuki Arai, Keiichi Tajima, Hiroaki Kato. Effect of speaking rate variation on the perception of singleton and geminate consonants in Japanese by native and Korean listeners. Proceedings of Meetings on Acoustics. 2013. 19
Perceptual characteristics of Japanese geminate consonants by Korean native listeners : Focusing on the relationship between geminate insertion and Korean intervocalic tense consonants. 2012. 42. 2. 137-142
