This paper proposes a novel lightweight method using the multitaper power spectrum to estimate arousal levels at wearable devices. We show that the spectral slope (1/f) of the electrophysiological power spectrum reflects the scale-free neural activity. To evaluate the proposed feature's performance, we used scalp EEG recorded during anesthesia and sleep with technician-scored Hypnogram annotations. It is shown that the proposed methodology discriminates wakefulness from reduced arousal solely based on the neurophysiological brain state with more than 80% accuracy. Therefore, our findings describe a common electrophysiological marker that tracks reduced arousal states, which can be applied to different applications (e.g., emotion detection, driver drowsiness). Evaluation on hardware shows that the proposed methodology can be implemented for devices with a minimum RAM of 512 KB with 55 mJ average energy consumption.
@article{arxiv.2108.00216,
title = {Single-Channel EEG Based Arousal Level Estimation Using Multitaper Spectrum Estimation at Low-Power Wearable Devices},
author = {Berken Utku Demirel and Ivan Skelin and Haoxin Zhang and Jack J. Lin and Mohammad Abdullah Al Faruque},
journal= {arXiv preprint arXiv:2108.00216},
year = {2021}
}
Comments
To appear at the 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'21), October 31