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. 2018 Jul 16;8:10740. doi: 10.1038/s41598-018-28924-7

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© The Author(s) 2018

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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The amount of temporary threshold shift (TTS) was highly variable, as shown here for two ears from two animals exposed to 10 blasts @ 165 dB SPL. (A) Threshold shifts for CAPs and DPOAEs as measured 5.5–7.5 hrs after the blast. Control range (pink shading) is from Fig. 4B. (B) Threshold shifts at 16 kHz for each of the four animals at numerous post-blast time points show the stability of threshold shifts in this acute phase. Downward arrows indicate minimum estimates because thresholds were higher than those for system-generated distortion. One ear only had CAP measures at one post-blast timepoint. All data are normalized to control means.