Human brain detects short-time nonlinear predictability in the temporal fine structure of deterministic chaotic sounds
Human brain detects short-time nonlinear predictability in the temporal fine structure of deterministic chaotic sounds
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人脑检测确定性混沌声音的时间精细结构中的短时非线性可预测性
DOI：
10.1103/physreve.87.042916
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Nakada T
中科院分区：
文献类型：
--
作者：
Itoh K;Nakada T
确定性非线性动力学过程在自然界中普遍存在。由这种过程产生的混沌声音可能在波形上看起来不规则和随机，但这些声音在数学上与随机的随机声音不同，因为它们在其时间精细结构中包含确定性的短期可预测性。我们表明，人脑区分确定性的混沌声音从频谱匹配的随机声音在神经处理和感知。确定性的混乱的声音，即使没有参加，引起更大的大脑皮层的反应比替代控制声音后约150毫秒的潜伏期后的声音发作。听众在感知中也能清楚地区分这些声音。研究结果支持这一假设，即人类听觉系统是敏感的微妙的短期预测嵌入在时间的声音精细结构。
Deterministic nonlinear dynamical processes are ubiquitous in nature. Chaotic sounds generated by such processes may appear irregular and random in waveform, but these sounds are mathematically distinguished from random stochastic sounds in that they contain deterministic short-time predictability in their temporal fine structures. We show that the human brain distinguishes deterministic chaotic sounds from spectrally matched stochastic sounds in neural processing and perception. Deterministic chaotic sounds, even without being attended to, elicited greater cerebral cortical responses than the surrogate control sounds after about 150 ms in latency after sound onset. Listeners also clearly discriminated these sounds in perception. The results support the hypothesis that the human auditory system is sensitive to the subtle short-time predictability embedded in the temporal fine structure of sounds.