Perception of the missing fundamental by chinchillas in the presence of low-pass masking noise.
Perception of the missing fundamental by chinchillas in the presence of low-pass masking noise.
复制标题
在存在低通掩蔽噪声的情况下，龙猫对缺失的基波的感知。
DOI：
10.1007/s10162-010-0237-0
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Shofner,WilliamP
中科院分区：
文献类型：
--
作者：
Shofner,WilliamP
缺失的基本音高(F0)是人类音高知觉的主要心理属性之一。采用操作条件反射和刺激泛化的方法，测量了龙猫对缺失F0的和谐音调复合体的行为反应。研究人员训练动物辨别500赫兹F0和125赫兹F0的音调复合体。当用具有相同F0的音调复合体测试动物时，当F0缺失时，反应与当F0存在时得到的反应相似，这表明缺少F0的声音在感知上与F0存在的声音相同。在低通掩蔽噪声存在的情况下，对F0存在和缺失F0刺激的行为反应相似，表明这种感觉不是由于F0通过耳蜗非线性重新插入所致。当测试复合体的F0被系统地改变时，行为反应的梯度被观察到，这表明存在与F0相关的心理维度。当F0和频谱独立变化时，行为反应与F0有关，而不是与测试刺激之间的频谱差异有关。结果表明，龙猫对缺失的F0有一种音调样的知觉，这种知觉不太可能是由耳蜗扭曲产物引起的。
The pitch of the missing fundamental (F0) is one of the principal psychological attributes of human pitch perception. Behavioral responses to harmonic tone complexes having missing F0s were measured in chinchillas using operant conditioning and stimulus generalization. Animals were trained to discriminate between tone complexes having a 500-Hz F0 and a 125-Hz F0. When animals were tested with tone complexes having the same F0s, but where the F0s were missing, responses were similar to those obtained when the F0s were present, suggesting that missing F0 sounds were perceptually equivalent to F0 present sounds. Behavioral responses to F0 present and missing F0 stimuli were similar in the presence of low-pass masking noise, suggesting that the perception was not due to the reinsertion of the F0 through cochlear nonlinearities. Gradients in behavioral responses were observed when the F0s of test complexes were systematically varied, suggesting the existence of a psychological dimension related to F0. Behavioral responses were related to the F0 rather than to spectral differences among test stimuli when the F0 and spectrum were varied independently. The results indicate that chinchillas possess a pitch-like perception of the missing F0 that is unlikely to arise from cochlear distortion products.