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. 2020 Sep 10;10:14894. doi: 10.1038/s41598-020-71399-8

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Behavioural paradigm and acoustic distractors. (a) Experimental protocol of twelve days. In the first four days chinchillas performed the visual discrimination without auditory distractors (baseline). Between days 5 and 9, a broad-band noise (BBN) was introduced as an auditory distractor, while between days 9 and 12, chinchilla distress vocalizations were used as distractors. (b) Temporal course of the visual discrimination task. (c–f) Acoustic characteristics of male chinchillas’ vocalizations. Panels c–f correspond to the order of presentation of vocalizations used from days 9 to 12 in the behavioural protocol. Information in the panel from top to bottom shows: fundamental frequency (F0), oscillogram, spectrogram, and spectral power measured in the middle of the pulse. (g) Broad-band noise used as auditory distractor between days 5 and 8.