MRC Cognition and Brain Sciences Unit, 15 Chaucer Road, Cambridge CB2 7EF, United Kingdom.
J Acoust Soc Am. 2013 Jan;133(1):377-88. doi: 10.1121/1.4770254.
Oxenham et al. [Proc. Nat. Acad. Sci. 101, 1421-1425 (2004)] reported that listeners cannot derive a "missing fundamental" from three transposed tones having high carrier frequencies and harmonically related low-frequency modulators. This finding was attributed to complex pitch perception requiring correct tonotopic representation but could have been due to the very high modulator rate difference limens (DLs) observed for individual transposed tones. Experiments 1 and 2 showed that much lower DLs could be obtained for bandpass-filtered pulse trains than for transposed tones with repetition rates of 100 or 300 pps; however, DLs were still larger than for low-frequency pure tones. Experiment 3 presented three pulse trains filtered between 1375 and 1875, 3900 and 5400, and 7800 and 10 800 Hz simultaneously with a pink-noise background. Listeners could not compare the "missing fundamental" of a stimulus in which the pulse rates were, respectively, 150, 225, and 300 pps, to one where all pulse trains had a rate of 75 pps, even though they could compare a 150 + 225 + 300 Hz complex tone to a 75-Hz pure tone. Hence although filtered pulse trains can produce fairly good pitch perception of simple stimuli having low repetition rates and high-frequency spectral content, no evidence that such stimuli enable complex pitch perception in the absence of a place-rate match was found.
奥克森汉姆等人在《美国国家科学院院刊》101 卷 1421-1425 页（2004 年）的报告中指出，听众无法从具有高频载波和谐波相关低频调制器的三个转调音中推断出“缺失的基频”。这一发现归因于复杂的音高感知，需要正确的音调代表性，但也可能是由于个体转调音观察到的非常高的调制器率差限（DL）。实验 1 和 2 表明，与重复率为 100 或 300pps 的转调音相比，带通滤波脉冲序列可以获得低得多的 DL；然而，DL 仍然大于低频纯音。实验 3 同时呈现了三个在 1375 和 1875Hz、3900 和 5400Hz、7800 和 10800Hz 之间滤波的脉冲序列，以及一个粉红噪声背景。即使听众可以将 150 + 225 + 300Hz 复音与 75Hz 纯音进行比较，他们也无法将脉冲率分别为 150、225 和 300pps 的刺激的“缺失基频”与所有脉冲序列的 75pps 率的刺激进行比较。因此，尽管滤波脉冲序列可以对具有低重复率和高频谱内容的简单刺激产生相当好的音高感知，但没有发现任何证据表明在没有位置-速率匹配的情况下，这些刺激能够实现复杂的音高感知。
