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. 2018 Oct 16;6(10):e11040. doi: 10.2196/11040

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©Onur Dur, Colleen Rhoades, Man Suen Ng, Ragwa Elsayed, Reinier van Mourik, Maulik D Majmudar. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 16.10.2018.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR mhealth and uhealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.

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Boxplot comparison (left) of average harmonic-to-noise ratio (HNR) estimated over 60-second nonoverlapping windows for each photoplethysmography wavelength: Nonin finger-clip pulse oximeter (Nonin IR), the wristband infrared (Wavelet IR), and the wristband red (Wavelet red). The histogram for pairwise difference of average HNR between Wavelet IR and Nonin IR signals (right). IR: infrared.