Pitch discrimination of diotic and dichotic tone complexes: Harmonic resolvability or harmonic number?
Pitch discrimination of diotic and dichotic tone complexes: Harmonic resolvability or harmonic number?
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DOI：
10.1121/1.1572146
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发表时间：
2003-06-01
影响因子：
2.4
通讯作者：
Oxenham, AJ
中科院分区：
文献类型：
--
作者：
Bernstein, JG;Oxenham, AJ
三个实验研究了谐波数、谐波分辨率和谐波复合感知之间的关系。具有 100 或 200 Hz 基频 (f(0)) 的连续等幅正弦或随机相位谐波分量的复合体以二分方式呈现，偶数和奇数分量呈现在相对的耳朵上，或者双耳呈现，所有谐波呈现在两只耳朵上。实验 1 测量了区分谐波复合分量与隔离纯音分量之间 3.5%-5% 频率差的性能。在双耳和双耳条件下，听众分别对大约前 10 个和 20 个谐波分别实现了至少 75% 的正确率，验证了只有在信息双耳组合之前的处理才限制频率选择性。实验 2 测量了基频差 limens (f(0) DLs) 作为平均最低谐波数的函数。两个 f(0) 的类似结果提供了进一步的证据，表明当仅呈现约 10 次以上的谐波时，在 f(0) DL 中观察到的数量级增加的基础是谐波数，而不是绝对频率。双耳和双耳条件下的类似结果。表明听觉系统在执行 f(0) 辨别时无法利用双耳分离情况下的附加外围解析谐波。在实验 3 中，含有低于 12 次谐波或仅高于 15 次谐波的二分复合波分别引发 f(0) 和两倍 f(0) 的音高。总之，实验 2 和实验 3 表明，无论外围分辨率如何，谐波数都控制着两种不同音高感知之间的过渡，一种基于各个解析谐波的频率，另一种基于时间包络的周期性。 (C) 2003 年美国物理研究所。
Three experiments investigated the relationship between harmonic number, harmonic resolvability, and the perception of harmonic complexes. Complexes with successive equal-amplitude sine- or random-phase harmonic components of a 100- or 200-Hz fundamental frequency (f(0)) were presented dichotically, with even and odd components to opposite ears, or diotically, with all harmonics presented to both ears. Experiment 1 measured performance in discriminating a 3.5%-5% frequency difference between a component of a harmonic complex and a pure tone in isolation. Listeners achieved at least 75% correct for approximately the first 10 and 20 individual harmonics in the diotic and dichotic conditions, respectively, verifying that only processes before the binaural combination of information limit frequency selectivity. Experiment 2 measured fundamental frequency difference limens (f(0) DLs) as a function of the average lowest harmonic number. Similar results at both f(0)'s provide further evidence that harmonic number, not absolute frequency, underlies the order-of-magnitude increase observed in f(0) DLs when only harmonics above about the 10th are presented. Similar results under diotic and dichotic conditions. indicate that the auditory system, in performing f(0) discrimination, is unable to utilize the additional peripherally resolved harmonics in the dichotic case. In experiment 3, dichotic complexes containing harmonics below the 12th, or only above the 15th, elicited pitches of the f(0) and twice the f(0), respectively. Together, experiments 2 and 3 suggest that harmonic number, regardless of peripheral resolvability, governs the transition between two different pitch percepts, one based on the frequencies of individual resolved harmonics and the other based on the periodicity of the temporal envelope. (C) 2003 American Institute of Physics.