Summary statistics in auditory perception
Summary statistics in auditory perception
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DOI：
10.1038/nn.3347
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发表时间：
2013-04-01
影响因子：
25
通讯作者：
Simoncelli, Eero P.
中科院分区：
文献类型：
--
作者：
McDermott, Josh H.;Schemitsch, Michael;Simoncelli, Eero P.
感官信号以高分辨率转换，但它们的结构必须以更紧凑的格式存储。在这里，我们提供的证据表明，听觉系统总结了时间的细节声音使用时间平均统计。我们测量的歧视的“声音纹理”，其特征在于特定的统计特性，通常是由于叠加的许多声学特征在听觉场景。当听众区分不同的纹理的例子，性能提高与摘录持续时间。与此相反，当听众区分不同的例子相同的纹理，性能下降的持续时间，一个矛盾的结果，因为可用于歧视的信息增长与持续时间。这些结果表明，一旦这些声音的长度适中，大脑的代表性仅限于时间平均的统计数据，其中，对于相同纹理的不同例子，随着持续时间的增加，收敛到相同的值。这样的统计表示产生良好的分类区分，但限制了辨别时间细节的能力。
Sensory signals are transduced at high resolution, but their structure must be stored in a more compact format. Here we provide evidence that the auditory system summarizes the temporal details of sounds using time-averaged statistics. We measured discrimination of 'sound textures' that were characterized by particular statistical properties, as normally result from the superposition of many acoustic features in auditory scenes. When listeners discriminated examples of different textures, performance improved with excerpt duration. In contrast, when listeners discriminated different examples of the same texture, performance declined with duration, a paradoxical result given that the information available for discrimination grows with duration. These results indicate that once these sounds are of moderate length, the brain's representation is limited to time-averaged statistics, which, for different examples of the same texture, converge to the same values with increasing duration. Such statistical representations produce good categorical discrimination, but limit the ability to discern temporal detail.