Does fundamental-frequency discrimination measure virtual pitch discrimination?
Does fundamental-frequency discrimination measure virtual pitch discrimination?
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DOI：
10.1121/1.3478786
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发表时间：
2010-10
期刊：
影响因子：
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通讯作者：
C. Micheyl;Kristin M. Divis;David M Wrobleski;A. Oxenham
中科院分区：
文献类型：
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作者：
C. Micheyl;Kristin M. Divis;David M Wrobleski;A. Oxenham
基音感知的研究通常涉及测量基频(F0)不同的复音调(DLC)的不同界限。这些测量被认为反映了F0的辨别力，并提供了主观音高强度的间接测量。然而，在许多情况下，辨别可能基于音调或F0以外的提示，例如各个分量或音色(亮度)的频率差异。在这里，在不同的条件下，包括随机或固定的最低谐波数，在有和没有反馈的情况下测量DLC的谐波和非谐波音调。非谐音是通过将所有谐波的频率上移6.25%、12.5%或25%F0而产生的。有人假设，如果DLC反映残基音高歧视，这些频移的音调产生的音调比产生的DLC更大，而不是和声音调。然而，如果DLC反映的是各分量音调或音色的比较，则它们不应系统地受到频移的影响。结果表明，非和谐音的DLC较大，基音匹配分散，证实非谐音产生的基音不如谐音一致，与DLC反映F0基音辨别的观点一致。
Studies of pitch perception often involve measuring difference limens for complex tones (DLCs) that differ in fundamental frequency (F0). These measures are thought to reflect F0 discrimination and to provide an indirect measure of subjective pitch strength. However, in many situations discrimination may be based on cues other than the pitch or the F0, such as differences in the frequencies of individual components or timbre (brightness). Here, DLCs were measured for harmonic and inharmonic tones under various conditions, including a randomized or fixed lowest harmonic number, with and without feedback. The inharmonic tones were produced by shifting the frequencies of all harmonics upwards by 6.25%, 12.5%, or 25% of F0. It was hypothesized that, if DLCs reflect residue-pitch discrimination, these frequency-shifted tones, which produced a weaker and more ambiguous pitch than would yield larger DLCs than the harmonic tones. However, if DLCs reflect comparisons of component pitches, or timbre, they should not be systematically influenced by frequency shifting. The results showed larger DLCs and more scattered pitch matches for inharmonic than for harmonic complexes, confirming that the inharmonic tones produced a less consistent pitch than the harmonic tones, and consistent with the idea that DLCs reflect F0 pitch discrimination.