Harmonic segregation through mistuning can improve fundamental frequency discrimination
Harmonic segregation through mistuning can improve fundamental frequency discrimination
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DOI：
10.1121/1.2956484
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发表时间：
2008-09-01
影响因子：
2.4
通讯作者：
Oxenham, Andrew J.
中科院分区：
文献类型：
--
作者：
Bernstein, Joshua G. W.;Oxenham, Andrew J.
本研究探讨谐波频率分辨与基频（f(0)）分辨之间的关系。与早期的研究一致，当f(0)减小到只出现十分之一以上的谐波时，对带通滤波谐波复合体的f(0)辨别能力急剧恶化。然而，当奇数次谐波被混淆3%时，性能显著提高，以至于性能几乎与只存在偶数次谐波时的性能相当。当交替谐波呈现给对耳时（二分条件），失谐也提高了性能。在一项涉及复合体内单个谐波频率识别的任务中，混淆奇数谐波对单个谐波的分辨率没有显著改善。与失谐复合物的音高匹配表明，均匀谐波在f(0) s内占主导地位，在f(0) s处观察到失谐的好处。结果表明，f(0)识别性能可以从基于非谐波的感知隔离中受益，并且当只有高次谐波存在时，性能不佳并非由于有限的周边谐波可分辨性。结合早期的结果，研究结果表明，f(0)辨别可能取决于听觉滤波器的带宽，但单个谐波的频谱分辨率既不是必要的，也不是准确辨别f(0)的充分条件。(C) 2008美国声学学会。
This study investigated the relationship between harmonic frequency resolution and fundamental frequency (f(0)) discrimination. Consistent with earlier studies, f(0) discrimination of a diotic bandpass-filtered harmonic complex deteriorated sharply as the f(0) decreased to the point where only harmonics above the tenth were presented. However, when the odd harmonics were mistuned by 3%, performance improved dramatically, such that performance nearly equaled that found with only even harmonics present. Mistuning also improved performance when alternating harmonics were presented to opposite ears (dichotic condition). In a task involving frequency discrimination of individual harmonics within the complexes, mistuning the odd harmonics yielded no significant improvement in the resolution of individual harmonics. Pitch matches to the mistuned complexes suggested that the even harmonics dominated the pitch for f(0)'s at which a benefit of mistuning was observed. The results suggest that f(0) discrimination performance can benefit from perceptual segregation based on inharmonicity, and that poor performance when only high-numbered harmonics are present is not due to limited peripheral harmonic resolvability. Taken together with earlier results, the findings suggest that f(0) discrimination may depend on auditory filter bandwidths, but that spectral resolution of individual harmonics is neither necessary nor sufficient for accurate f(0) discrimination. (C) 2008 Acoustical Society of America.