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. 2018 Dec 4;17:180. doi: 10.1186/s12938-018-0613-2

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 10 — Comparison of CNRs of the HbOs obtained by the LPF approach (blue bars) and the proposed method (red bars) (Sub. 2): The proposed method shows that the number of channels exhibiting improved CNR is higher