Communication breakdown: Limits of spectro-temporal resolution for the perception of bat communication calls.
Communication breakdown: Limits of spectro-temporal resolution for the perception of bat communication calls.
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DOI：
10.1038/s41598-021-92842-4
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发表时间：
2021-07-01
影响因子：
4.6
通讯作者：
Firzlaff U
中科院分区：
文献类型：
--
作者：
Hörpel SG;Baier AL;Peremans H;Reijniers J;Wiegrebe L;Firzlaff U
在言语交际中，发声的时空结构传递着重要的语境信息。蝙蝠在利用声音进行回声定位方面出类拔萃，因为它们在时间域中对信号进行了细致的编码。因此，我们假设，对于社会交流，蝙蝠也会擅长于检测呼叫的频谱-时间结构中的微小扭曲。为了验证这一假说，我们系统地将谱-时间失真引入到竹类变色蝙蝠的通信呼叫中。我们将每个呼叫分解成相同长度的窗口，并对每个窗口内的相位谱进行随机化。通信呼叫中的频谱-时间失真的总体程度随着窗口长度的增加而增加。对蝙蝠听觉外周的模拟显示，耳蜗机能辨别快速的频谱-时间包络。我们用实验的心理物理和神经生理学数据来评估模型预测。我们首先评估了蝙蝠在区分原始呼叫版本和日益扭曲的相同呼叫版本方面的表现。我们进一步研究了大脑皮层的反应，以确定在大脑皮层水平上叫声辨别的其他特化。心理物理和大脑皮层反应与模型预测一致，显示辨别阈值在8-15ms随机窗口长度的范围内。我们的数据表明，专门的大脑皮层区域并不是赋予沟通通话中时间扭曲的心理物理弹性所必需的。
During vocal communication, the spectro-temporal structure of vocalizations conveys important contextual information. Bats excel in the use of sounds for echolocation by meticulous encoding of signals in the temporal domain. We therefore hypothesized that for social communication as well, bats would excel at detecting minute distortions in the spectro-temporal structure of calls. To test this hypothesis, we systematically introduced spectro-temporal distortion to communication calls of Phyllostomus discolor bats. We broke down each call into windows of the same length and randomized the phase spectrum inside each window. The overall degree of spectro-temporal distortion in communication calls increased with window length. Modelling the bat auditory periphery revealed that cochlear mechanisms allow discrimination of fast spectro-temporal envelopes. We evaluated model predictions with experimental psychophysical and neurophysiological data. We first assessed bats’ performance in discriminating original versions of calls from increasingly distorted versions of the same calls. We further examined cortical responses to determine additional specializations for call discrimination at the cortical level. Psychophysical and cortical responses concurred with model predictions, revealing discrimination thresholds in the range of 8–15 ms randomization-window length. Our data suggest that specialized cortical areas are not necessary to impart psychophysical resilience to temporal distortion in communication calls.
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影响因子：
1.7
作者：
ESSER, KH
通讯作者：
ESSER, KH
DOI：
10.1073/pnas.94.25.14019
发表时间：
1997-12-09
影响因子：
11.1
作者：
Esser, KH;Condon, CJ;Kanwal, JS
通讯作者：
Kanwal, JS
影响因子：
2.4
作者：
Dau, T;Puschel, D;Kohlrausch, A
通讯作者：
Kohlrausch, A
影响因子：
2.4
作者：
de Cheveigné, A;Kawahara, H
通讯作者：
Kawahara, H
影响因子：
2.5
作者：
Hoerpel, Stephen Gareth;Firzlaff, Uwe
通讯作者：
Firzlaff, Uwe