Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Motion-resilient Heart Rate Monitoring with In-ear Microphones   With the soaring adoption of in-ear wearables, the research community has
started investigating suitable in-ear heart rate (HR) detection systems. HR is
a key physiological marker of cardiovascular health and physical fitness.
Continuous and reliable HR monitoring with wearable devices has therefore
gained increasing attention in recent years. Existing HR detection systems in
wearables mainly rely on photoplethysmography (PPG) sensors, however, these are
notorious for poor performance in the presence of human motion. In this work,
leveraging the occlusion effect that can enhance low-frequency bone-conducted
sounds in the ear canal, we investigate for the first time \textit{in-ear
audio-based motion-resilient} HR monitoring. We first collected the HR-induced
sound in the ear canal leveraging an in-ear microphone under stationary and
three different activities (i.e., walking, running, and speaking). Then, we
devise a novel deep learning based motion artefact (MA) mitigation framework to
denoise the in-ear audio signals, followed by an HR estimation algorithm to
extract HR. With data collected from 20 subjects over four activities, we
demonstrate that hEARt, our end-to-end approach, achieves a mean absolute error
(MAE) of 5.46$\pm$6.50BPM, 12.34$\pm$9.24BPM, 14.22$\pm$10.69BPM and
15.44$\pm$11.43BPM for stationary, walking, running and speaking, respectively,
opening the door to a new non-invasive and affordable HR monitoring with usable
performance for daily activities. Not only does the performance hEARt
outperform that of previous in-ear HR monitoring work, but is comparable (and
even better whenever full-body motion is concerned) to that reported by in-ear
PPG works.

21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: eess