Shaikh, Usman QamarKalra, Anubha ManjuLowe, AndrewNiazi, Imran Khan2025-05-282025-05-282024-12-1197983315301432376-88862376-8894http://hdl.handle.net/10292/19259Long-term electroencephalogram (EEG) monitoring requires devices that are unobtrusive, comfortable, and user-friendly. Capacitive electrodes, unlike gel or dry electrodes, do not require direct galvanic skin contact, making them ideal for extended use. This paper investigates the efficacy of capacitive electrodes for recording four biopotential channels from around-ear areas. A printed circuit board was developed and assessed through an alpha-block experiment. The posterior-ear capacitive EEG achieved a statistically significant power gain (APSD) of 2.77 dB in the alpha band and 5.84 dB at 10 Hz. Additionally, a mean absolute error (MAE) of 8.9 milliseconds was observed between heart rate variability (HRV) measurements from a capacitive superior-ear electrode and shoulder ECG. These results indicate that around-ear capacitive electrodes are suitable for multimodal biopotential applications, offering a promising solution for long-term EEG monitoring.© 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works46 Information and Computing Sciences40 Engineering3208 Medical Physiology32 Biomedical and Clinical Scienceselectroencephalographynon-contact capacitive electrodeslong term monitoringear-EEGConference ContributionOpenAccess10.1109/bsn63547.2024.10780484