The role of temporal coherence and temporal predictability in the build-up of auditory grouping.
The role of temporal coherence and temporal predictability in the build-up of auditory grouping.
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DOI：
10.1038/s41598-022-18583-0
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发表时间：
2022-08-25
影响因子：
4.6
通讯作者：
Bizley, Jennifer K.
中科院分区：
文献类型：
--
作者：
Sollini, Joseph;Poole, Katarina C.;Blauth-Muszkowski, Dominic;Bizley, Jennifer K.
耳蜗将声音分解成单独的频率通道，听觉大脑必须从中重建听觉场景。要做到这一点，听觉系统必须决定哪些频率信息应该组合在一起，哪些应该保持不同。分组的两个关键线索是时间相干性和时间可预测性，前者是由频率上功率的相干变化引起的，后者是由随时间的规律或可预测变化引起的。为了测试这些线索如何有助于构建声音场景，我们向听众提供了一系列前驱声音，这些声音通过提供有关每个声音结构的信息来启动听觉系统，然后是一个固定的掩蔽声，要求参与者检测嵌入音调的存在。通过操纵时间的连贯性和/或时间的可预测性的前体，我们评估如何事先的声音曝光影响随后的听觉分组。在实验1中，我们测量的贡献时间的可预测性，提出时间规则或抖动的前体，并通过使用窄或宽带的声音时间的连贯性，这表明，都独立地有助于掩蔽/解蔽。在实验2中，我们测量的时间相干性和时间的可预测性的相对影响，并询问是否在前体中的每一个的影响意味着增强或干扰的揭露。我们观察到，干扰前体产生最大的变化阈值。
The cochlea decomposes sounds into separate frequency channels, from which the auditory brain must reconstruct the auditory scene. To do this the auditory system must make decisions about which frequency information should be grouped together, and which should remain distinct. Two key cues for grouping are temporal coherence, resulting from coherent changes in power across frequency, and temporal predictability, resulting from regular or predictable changes over time. To test how these cues contribute to the construction of a sound scene we present listeners with a range of precursor sounds, which act to prime the auditory system by providing information about each sounds structure, followed by a fixed masker in which participants were required to detect the presence of an embedded tone. By manipulating temporal coherence and/or temporal predictability in the precursor we assess how prior sound exposure influences subsequent auditory grouping. In Experiment 1, we measure the contribution of temporal predictability by presenting temporally regular or jittered precursors, and temporal coherence by using either narrow or broadband sounds, demonstrating that both independently contribute to masking/unmasking. In Experiment 2, we measure the relative impact of temporal coherence and temporal predictability and ask whether the influence of each in the precursor signifies an enhancement or interference of unmasking. We observed that interfering precursors produced the largest changes to thresholds.
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DOI：
10.1037/0096-1523.11.3.257
发表时间：
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影响因子：
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