The integration of photoplethysmography (PPG) sensors with advanced CMOS technology has ushered in a new era of wearable health monitoring devices that combine high sensitivity with significantly ...

Photoplethysmography (PPG) is an optical technique that provides a non‐invasive method to monitor cardiovascular dynamics by detecting blood volume changes in the microvascular bed of tissue. This ...

Apple Watch users who wake up to inconsistent sleep data have a real problem: the device tracks sleep using optical heart-rate sensors and motion detection, but the accuracy of those readings depends ...