Why the study?
Can an earbud-based PPG sensor with dual-ear noise reduction accurately measure heart rate during motion and estimate stress and drowsiness?
Can an earbud-based PPG sensor with dual-ear noise reduction accurately measure heart rate during motion and estimate stress and drowsiness?
An earbud-based PPG sensor utilizing a novel dual-ear noise reduction algorithm can accurately estimate heart rate during motion and shows potential for continuous stress and drowsiness monitoring.
This paper presents an earbud-based photoplethysmography (PPG) and its application. This PPG recording system permits long-term continuous monitoring of cardiovascular function since it can be worn comfortably on ears. Experimental investigations showed that stress and drowsiness could be estimated by analyzing measured PPG signals. Furthermore, noise suppression techniques for motion noises and ambient light interferences are introduced to make a recorded signal more acceptable.
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Tomita et al. (2017) studied this question.
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