The case of the missing delay lines:: Synthetic delays obtained by cross-channel phase interaction
The case of the missing delay lines:: Synthetic delays obtained by cross-channel phase interaction
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DOI：
10.1121/1.2195291
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发表时间：
2006-06-01
影响因子：
2.4
通讯作者：
Pressnitzer, Daniel
中科院分区：
文献类型：
--
作者：
de Cheveigne, Alain;Pressnitzer, Daniel
音高和谐波分离的时间模型要求延迟达30毫秒，以覆盖音乐音高的全部存在范围。到目前为止，几乎没有解剖学或生理学上的证据表明延迟这么长时间。我们提出了一种由跨信道相位相互作用合成延迟的机制。相邻耳蜗滤波器通道的相位按频率成比例移位，然后将其合并为加权和以近似延迟。合成延迟可用于音调感知模型（如自相关）、分离模型（如谐波抵消）和双耳处理模型，以解释对大耳间延迟的敏感性。合成延迟的最大持续时间受限于人工耳蜗滤波器脉冲响应的持续时间，其本身与人工耳蜗滤波器带宽成反比。因此，最大延迟取决于频率。这也许可以解释这样一个事实，即对于自相关等时间音高模型来说，音高更明显，更容易区分包含可分辨的部分音的复杂音调。(c) 2006年美国声学学会。
Temporal models of pitch and harmonic segregation call for delays of up to 30 ms to cover the full range of existence of musical pitch. To date there is little anatomical or physiological evidence for delays that long. We propose a mechanism by which delays may be synthesized from cross-channel phase interaction. Phases of adjacent cochlear filter channels are shifted by an amount proportional to frequency and then combined as a weighted sum to approximate a delay. Synthetic delays may be used by pitch perception models such as autocorrelation, segregation models such as harmonic cancellation, and binaural processing models to explain sensitivity to large interaural delays. The maximum duration of synthetic delays is limited by the duration of the impulse responses of cochlear filters, itself inversely proportional to cochlear filter bandwidth. Maximum delay is thus frequency dependent. This may explain the fact, puzzling for temporal pitch models such as autocorrelation, that pitch is more salient and easy to discriminate for complex tones that contain resolved partials. (c) 2006 Acoustical Society of America.