2012 Fiscal Year Final Research Report
Experimental and theoretical studieson the auditory system for speech perception
| Project/Area Number |
21300069
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Perception information processing/Intelligent robotics
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| Research Institution | Wakayama University |
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Principal Investigator |
IRINO Toshio 和歌山大学, システム工学部, 教授 (20346331)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAHARA Hideki 和歌山大学, システム工学部, 教授 (40294300)
TSUZAKI Minoru 京都市立芸術大学, 音楽学部, 准教授 (60155356)
NISHIMURA Ryuichi 和歌山大学, システム工学部, 助教 (00379611)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 聴覚計算理論 / 音声信号処理 / 寸法知覚 / 聴覚心理実験 / 神経科学 / fMRI |
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| Research Abstract |
We performedthe experimentaland computational studies on the auditory systemwhich provides the basis of speech perception.
1) Perception of size and shape from speech sounds: We found the size JNDs are almost the same for voiced and whispered speechand sufficiently small even for short sounds.
2) Auditory filter characteristics and perception by hearing impaired and normal hearing:We proposed a new method to measure auditory filter selectivity and compression simultaneously. Wedeveloped a signal processing techniquetosimulatehearing impairment within a unified gammachirp framework.
3) Functional MRI (fMRI) experiments:We studied the location of size processing in the auditory cortex.
4) Modeling of speech perception and signal processing:We demonstrated the gammachirp filterbank outperformsconventional mel-frequencyfilterbanksin the task of vocal tract length estimation. We also improvedthe STRAIGHT systemfor speech experiments.
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