| Project/Area Number |
23730715
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Experimental psychology
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| Research Institution | Nara Medical University |
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Principal Investigator |
MATSUI Toshie 奈良県立医科大学, 耳鼻咽喉科, 頭頸部外科学講座 (10510034)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 知覚 / 聴覚 / ピッチ / サイズ / 時系列パタン / 実験心理学 |
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| Research Abstract |
It has been modeled that the auditory system encodes acoustic signals into two independent informations. One is tonotopic information reflecting the frequency response characteristics of the basilar membrane, and another is periodicity information reflecting the temporal patterns of phase-locked auditory nerve firing. Based on the previous study about size perception of sound source, a hypothesis can be proposed that the tonotopic and periodicity information are combined into an internal “two-dimensional representational plane.” The current study tested this hypothesis by conducting an experiment to recognize the transition pattern of vowel-like sounds on the plane. Listeners were able to recognize the transition patterns on the axes of tonotopic and periodicity information exclusively. However, they were unable to follow the trajectories of sounds in the two-dimensional representational plane. The vowel-like sounds were simulated by a computational model of auditory system, Auditory Image Model. While the “excitation pattern” displayed transition patterns corresponding to the manipulation of resonant scaling (RS) only, “Summary SAI” displayed both of patterns of fundamental frequency (F0) and RS. It suggests the interaction between RS and F0 on the periodicity information dimension.
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