Jiachen Tammy Yan

PPG Earring: Wireless Smart Earring for Heart Health Monitoring

Heart rate is a key vital sign for cardiovascular health and fitness. However, the photoplethysmography (PPG) sensors that monitor heart rate in wearables struggle with accuracy during motion. Our day-long in-the-wild study shows Fitbit measures valid heart rates only 54.88% of the time. To address this, we developed…