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. 2020 Dec 4;10:21242. doi: 10.1038/s41598-020-77664-0

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

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Filtering performance when a real EMG with added simulated stimulation and m-wave artefacts was filtered with the short adaptive, and the comb filter. (a) Original EMG. (b) The original EMG with simulated stimulation and m-wave artefacts added. (c) Spectrum of the original EMG and, the original EMG with stimulus and m-wave artefacts. (d) Coherence between the original EMG and, the original EMG with the added artefacts. (e) Extracted signal with both the adaptive and comb filter. (f) Spectrum of the original and the signal extracted with both the adaptive and comb filter. (g) Coherence between the original signal and the signal extracted with both the adaptive and comb filter. (h) Extracted signal with only the adaptive filter. (i) Spectrum of the original and the signal extracted with only the adaptive filter. (j) Coherence between the original and the signal extracted with only the adaptive filter. (k) Extracted signal with comb filter. (l) Spectrum of the original and the signal extracted with comb filter, (m) Coherence between the original signal and the signal extracted with comb filter.