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. 2020 Feb 21;10:3155. doi: 10.1038/s41598-020-60171-7

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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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Measurements of the sound spectrum signature of the weevil larvae. (a) ~12 days old weevil larvae (b,c) Representative examples of time-domain signals and (d,e) corresponding power spectra of the sound emitted by the larvae, recorded via microphone. (f) Time-domain signal and (g) corresponding power spectrum of the background noise recorded via microphone.