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. 2021 Jul 22;7:55. doi: 10.1038/s41378-021-00274-x

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© The Author(s) 2021

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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Fig. 7 — a, b, c Sound sensor monitoring of the patient (#23) on July 10 (a), July 24 (b), and September 02, 2020 (c). a_i, b_i, c_i Lung sounds recorded by our sensor; a_ii, b_ii, c_ii Heart sounds detected by our sensor. d Time evolution of lung sounds of the patient detected by sensor monitoring. e Time evolution of heart sounds of the patient detected by our sound sensor monitoring (red curve) compared with ECG data (black curve)