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首页> 外文期刊>Neuron >Reverberation challenges the temporal representation of the pitch of complex sounds.
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Reverberation challenges the temporal representation of the pitch of complex sounds.

机译：混响挑战了复杂声音音调的时间表示。

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摘要

Accurate neural coding of the pitch of complex sounds is an essential part of auditory scene analysis; differences in pitch help segregate concurrent sounds, while similarities in pitch can help group sounds from a common source. In quiet, nonreverberant backgrounds, pitch can be derived from timing information in broadband high-frequency auditory channels and/or from frequency and timing information carried in narrowband low-frequency auditory channels. Recording from single neurons in the cochlear nucleus of anesthetized guinea pigs, we show that the neural representation of pitch based on timing information is severely degraded in the presence of reverberation. This degradation increases with both increasing reverberation strength and channel bandwidth. In a parallel human psychophysical pitch-discrimination task, reverberation impaired the ability to distinguish a high-pass harmonic sound from noise. Together, these findings explain the origin of perceptual difficulties experienced by both normal-hearing and hearing-impaired listeners in reverberant spaces.
机译：对复杂声音的音调进行精确的神经编码是听觉场景分析的重要组成部分。音高的差异有助于分离并发声音，而音高的相似性可以帮助将来自同一来源的声音归为一组。在安静，无混响的背景中，可以从宽带高频听觉通道中的定时信息和/或从窄带低频听觉通道中携带的频率和定时信息中得出音调。记录从麻醉的豚鼠的耳蜗核中的单个神经元，我们表明基于时间信息的音高的神经表示在混响的存在下严重退化。随着混响强度和信道带宽的增加，这种劣化也增加。在并行的人类心理音高区分任务中，混响削弱了区分高通谐波声音和噪声的能力。在一起，这些发现解释了在混响空间中正常听觉和听觉受损的听众所经历的知觉困难的根源。

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