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. 2020 Jun 12;10:9571. doi: 10.1038/s41598-020-66715-1

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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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Neural responses to noise bursts in two different sound-level contexts. (A) Response time courses (averaged across a fronto-central electrode cluster) for sound level × context conditions. (B) P1-N1 and P2-N1 peak-to-peak amplitudes for target-noise bursts with different intensities (one centered on 15.7 dB and one on 44.3 dB) for the 15-dB SL context and for the 45-dB SL context. Error bars reflect the standard error of the mean (removal of between-subject variance⁶⁷). The interaction between context and target-intensity category is significant for both P1-N1 and P2-N1 amplitudes (p < 0.05). (C) Amplitude difference between the 15-dB SL and 45-dB SL contexts, separately for low- and high-intensity targets. A positive value means a larger amplitude for the 15-dB SL compared to the 45-dB SL context, whereas a negative value means a larger amplitude for the 45-dB SL compared to the 15-dB SL context. Topographical distributions reflect the mean response difference between the two statistical contexts. #p ≤ 0.01, *p ≤ 0.05, n.s. – not significant.