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| Abstract |
Two physically separated frequency glides. that partly overlap each other. can be perceived as one continuous pitch trajectory. accompanied by a short tone in the temporal middle. This .. middle tone"... can be perceived even when the glides are separated by more than one critical bandwidth [Nakajima et al.. (2000). Perception & Psychophysics. 62(7), 1413-1425]. Here. the perception of the continuous pitch trajectory was investigated. It was found that the perceptual continuity also appears when the frequency separation between the glide components was larger than a critical bandwidth, or one ERB. Moreover. the continuity perception in stimulus patterns with two partly overlapping frequency glides was found to be as compelling as that in stimulus patterns where the overlap was replaced with an intense noise band of the same duration. That is. the perceptual continuity of the long trajectory in the present paradigm is comparable to a typical auditory continuity effect. The experiments show that any explanation of the perceptual continuity of the pitch trajectory cannot be easily given in terms of peripheral activity alone.
時間および周波数座標上で分離しており，時間上で部分的に重なり合うような，二つの周波数変化音は，高さが連続的に変化する一つの音と，その時間的中央にあるもう一つの短い音として知覚されることがある。この「真中の音」は， 二つの周波数変化音が臨界帯域幅より離れているときにも知覚される場合がある［Nakajima et al., (2000). Perception & Psychophysics, 62(7), 1413-1425］。本論文では，高さが連続的に変化する音の知覚について調べた。知覚上の連続性は，二つの周波数変化音が臨界帯域幅，あるいはERBよりも大きく離れている場合にも生ずることが見出された。更に，部分的に重なり合った周波数変化音において知党される連続性は，重なった部分を，持続時間の等しい強い帯域雑音に置き換えた刺激パターンにおいて知覚される連続性に匹敵する。すなわち，ここでの実験の枠組みにおいて得られる，高さが連続的に変化する音の知党上の連続性は，典型的な連続聴効果に比べうるものである。そして，この連続性に対して，末梢のみによる説明を与えることはできない。show more
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Remijn_Nakajima_TenHoopen_2001