Pitch perception: A dynamical-systems perspective
Pitch perception: A dynamical-systems perspective
复制标题
音高感知：动力系统视角
DOI：
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发表时间：
2001
影响因子：
11.1
通讯作者：
O. Piro
中科院分区：
文献类型：
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作者：
J. Cartwright;Diego L. González;O. Piro
2500年前，毕达哥拉斯开始了对声音音高的科学研究;然而，我们对音高感知机制的理解仍然不完整。音高感知的物理模型试图从基本原理解释为什么刺激的某些物理特征导致特定的音高感觉。有两大类音高感知模型：位置或频谱模型认为音高主要与刺激的傅立叶频谱有关，而对于周期性或时间模型，其在时域中的特性更重要。目前的模型，无论是类通常是计算密集型的，实现了一系列的步骤或多或少的听觉生理学的支持。然而，大脑必须对来自耳朵和其他感官的大量信息进行真实的分析和反应。所有这些信息在神经系统中是如何有效地表达和处理的？非线性和复杂系统研究的一个建议是，动力学吸引子可能构成神经信息处理的基础。由于听觉系统是一个复杂且高度非线性的动力系统，因此很自然地假设动态吸引子可能具有感知和功能意义。在这里，我们表明，这个想法，几乎没有在目前的音高模型，可以成功地应用于音高感知。
Two and a half millennia ago Pythagoras initiated the scientific study of the pitch of sounds; yet our understanding of the mechanisms of pitch perception remains incomplete. Physical models of pitch perception try to explain from elementary principles why certain physical characteristics of the stimulus lead to particular pitch sensations. There are two broad categories of pitch-perception models: place or spectral models consider that pitch is mainly related to the Fourier spectrum of the stimulus, whereas for periodicity or temporal models its characteristics in the time domain are more important. Current models from either class are usually computationally intensive, implementing a series of steps more or less supported by auditory physiology. However, the brain has to analyze and react in real time to an enormous amount of information from the ear and other senses. How is all this information efficiently represented and processed in the nervous system? A proposal of nonlinear and complex systems research is that dynamical attractors may form the basis of neural information processing. Because the auditory system is a complex and highly nonlinear dynamical system, it is natural to suppose that dynamical attractors may carry perceptual and functional meaning. Here we show that this idea, scarcely developed in current pitch models, can be successfully applied to pitch perception.