Faculty Profiles - NAKATOH Yoshihisa

Papers - NAKATOH Yoshihisa

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中国深センへの学生派遣プログラムの取り組み

楊世淵, 中藤良久, 近野泰

教育ブレティン = Educational bulletin ( 九州工業大学 ) 3 - 12 2018.01

Improvement Method of Speech Intelligibility by Enhancement of Spectral Variation Reviewed International journal

Kawahara Shunsuke, Hirakawa Rin, Nakatoh Yoshihisa

The Japanese Journal of the Institute of Industrial Applications Engineers ( The Institute of Industrial Applications Engineers ) 6 ( 1 ) 51 - 54 2018.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)

It is hard to listen to an announcement in a noisy environments such as in a train while running. In this paper, to improve speech intelligibility in a noisy environment, we focused on the time variation of speech spectral representing spectral flux from the analysis result which clear speech has larger spectral flux than normal speech. Therefore, we propose speech enhancement method of spectral variation to improve the sound quality evaluation value of STOI. In the evaluation results of STOI score, enhanced speech by proposed method improved more than original speech in all the SNR conditions (SNR = -5, -10, -15 dB). Also, the significant difference in the dangerous rate of 5% was found in SNR = -10, -15 dB.

DOI： 10.12792/jjiiae.6.1.51

Kyutacar

CiNii Article

CiNii Research

Other Link： http://id.ndl.go.jp/bib/029502703

Comparison of nonverbal feature of free conversation speech between elderly and young individuals Reviewed International journal

Wakita Yumi

Proceeding of the 5th IIAE International Conference on Intelligent Systems and Image Processing 2017 5 291 - 296 2017.01

The quality improvement of alternative vocalization singing method by sound pressure correction to the LPC residual wave

Record of Joint Conference of Electrical and Electronics Engineers in Kyushu ( Committee of Joint Conference of Electrical, Electronics and Information Engineers in Kyushu ) 2015 ( 0 ) 55 - 55 2015.01

Aging effect on frequency characteristics of word utterances

OGATA Kazuto, MIZUMACHI Mitsunori, NAKATOH Yoshihisa

IEICE technical report. Welfare Information technology ( The Institute of Electronics, Information and Communication Engineers ) 114 ( 261 ) 49 - 54 2014.10

Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

Advanced nations including Japan are facing aging societies. Aging decreases the ability in speech communication. In this paper, aging effect on speech is investigated in the viewpoint of static characteristics. Japanese words uttered by 21 elderly speakers, of which ages range from 64 years old to 87 years old, are used for calculating their power spectra. Concerning Japanese five vowels, the power spectra are calculated only using the initial phonemes of the words. The power spectra for elderly speakers decrease in the frequency range between 2.5 kHz and 4.5 kHz, and increase in higher frequency range over 4.5 kHz.

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/110009958972

A-4-18 Improvement of intelligibility for elderly speech based on formant frequency shift

Tanaka Yuto, Igaue Hiroaki, Mizumachi Mitsunori, Nakatoh Yoshihisa, Matsui Kenji

Proceedings of the Society Conference of IEICE ( The Institute of Electronics, Information and Communication Engineers ) 2014 2014.09

Improvement of Speech Intelligibility Using Acoustic Features for Elderly People

Igaue Hiroaki, Tanaka Yuto, Mizumachi Mitsunori, Nakato Yoshihisa

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2014 ( 0 ) 20 - 21 2014.01

Study of Acoustic Characteristics to Detect Vehicle Approach for Elderly People Support

Furuno Yoshihiro, Mizumachi Mitsunori, Nakato Yoshihisa

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2014 ( 0 ) 22 - 23 2014.01

Sound Quality Improvement of Singing Voice by Electro-Larynx

Himeno Takashi, Hei Takafumi, Tanaka Yuto, Mizumachi Mitsunori, Nakatoh Yoshihisa, Matsui Kenji

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2014 ( 0 ) 16 - 17 2014.01

Study of Text to Speech Based on the Extraction of Important Words for Visual Impaired Person

Misawa Takumi, Mizumachi Mitsunori, Nakatoh Yosihisa

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2014 ( 0 ) 18 - 19 2014.01

Study of Auxiliary Sound Added Directivity to Improve Speech Intelligibility

Fujiwara Ryota, Mizumachi Mitsunori, Nakatoh Yoshihisa

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2014 ( 0 ) 14 - 15 2014.01

Evaluation of Utterance Support System using Character Input in Actual Use

Hamai Yuya, Mizumachi Mitsunori, Nakatoh Yoshihisa, Matsui Kenji

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2014 ( 0 ) 38 - 39 2014.01

Study of Volume Limit for Hearing Protection in Portable Music Players

Higashi Teruhisa, Mizumachi Mitsunori, Nakatoh Yoshihisa

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2014 ( 0 ) 24 - 25 2014.01

K-064 Study of Character Input Using Word Prediction for Utterance Support

Hamai Yuya, Mizumachi Mitsunori, Nakatoh Yoshihisa, Matsui Kenji

( Forum on Information Technology ) 12 ( 3 ) 701 - 704 2013.08

A-19-12 Preliminary Study of Character Input Using Word Prediction for Utterance Support

Hamai Yuya, Nakatoh Yoshihisa

Proceedings of the IEICE General Conference ( The Institute of Electronics, Information and Communication Engineers ) 2013 2013.03

D-14-11 Development of Electrolarynx Using Motion Sensor

Matsui Kenji, Otsuki Yuma, Nakatoh Yoshihisa, Kato Yumiko

Proceedings of the IEICE General Conference ( The Institute of Electronics, Information and Communication Engineers ) 2013 ( 1 ) 2013.03

Preliminary Study of Speech Quality Improvement for Electronic Artificial Larynx

Examination of Influence of Difference of Sound Source Waveform on Electric Laryngeal Sound

Hei Takafumi, Tanaka Hiroto, Mizumachi Mitsunori, Nakato Yoshihisa, Matsui Kenji

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2013 ( 0 ) 24 - 25 2013.01

A Study on Word Spotting Speech Recognition Method for the Speech Including Japanese Surname

Tabata Ryuji, Mizumachi Mitsunori, Nakato Yoshihisa

Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers ) 2013 ( 0 ) 22 - 23 2013.01

D-14-11 The Study of Relationship between Acoustic Property and Speech Recognition Rate for Elderly People

Ide Takahiro, Mizumachi Mitsunori, Nakatoh Yoshihisa

Proceedings of the IEICE General Conference ( The Institute of Electronics, Information and Communication Engineers ) 2012 ( 1 ) 2012.03

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