Abstract
Wearable devices have rapidly evolved as essential tools for continuous health monitoring. However challenges persist in achieving high-accuracy physiological data acquisition due to issues such as suboptimal sensor placement and environmental interference. To overcome these limitations, we introduce a wearable ear sensor designed to offer comprehensive and reliable physiological monitoring. The sensor integrates different sensing modalities, including electroencephalography (EEG) and electromyography (EMG), within a compact, user-friendly form optimized for long-term wear. Utilizing biocompatible polydimethylsiloxane (PDMS) for in-ear electrodes and a lightweight reference electrode, the device ensures stable contact and signal fidelity. The designed signal acquisition system is able to realize low-noise amplification and adaptive signal processing, enabling accurate detection of low-amplitude bioelectrical signals. Experimental validation demonstrates the sensor's capability to capture and analyze physiological signals associated with various activities, such as eye movements and respiratory rhythms. The findings highlight the potential of ear-worn sensors in advancing wearable health monitoring technologies, with applications in both clinical and consumer health contexts.