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首页> 外文期刊>Neuron >Hearing illusory sounds in noise: the timing of sensory-perceptual transformations in auditory cortex.
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Hearing illusory sounds in noise: the timing of sensory-perceptual transformations in auditory cortex.

机译：在噪音中听到虚幻的声音：听觉皮层中感官知觉转变的时机。

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摘要

Constructive mechanisms in the auditory system may restore a fragmented sound when a gap in this sound is rendered inaudible by noise to yield a continuity illusion. Using combined psychoacoustic and electroencephalography experiments in humans, we found that the sensory-perceptual mechanisms that enable restoration suppress auditory cortical encoding of gaps in interrupted sounds. When physically interrupted tones are perceptually restored, stimulus-evoked synchronization of cortical oscillations at approximately 4 Hz is suppressed as if physically uninterrupted sounds were encoded. The restoration-specific suppression is induced most strongly in primary-like regions in the right auditory cortex during illusorily filled gaps and also shortly before and after these gaps. Our results reveal that spontaneous modulations in slow evoked auditory cortical oscillations that are involved in encoding acoustic boundaries may determine the perceived continuity of sounds in noise. Such fluctuations could facilitate stable hearing of fragmented sounds in natural environments.
机译：当听觉系统中的间隙因噪音而无法听清时，听觉系统中的构造机制可能会恢复其片段性声音，从而产生连续性幻觉。通过在人类中使用组合的心理声学和脑电图实验，我们发现能够恢复的感觉-感知机制抑制了听觉皮层中声音间隙的编码。当感知到物理上中断的音调后，大约4 Hz的皮质振动的刺激诱发同步被抑制，就好像物理上不间断的声音被编码了一样。在虚假填充的间隙中以及在这些间隙之前和之后不久，在右听皮层的初级样区域中最强烈地诱导了修复特异性抑制。我们的结果表明，在缓慢的诱发听觉皮层振荡中的自发调制涉及编码声边界，这可能会确定噪声中感知到的声音的连续性。这种波动可能有助于在自然环境中稳定听见零碎的声音。

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