Published News

Apple Watch heart rate sensing

https://w1q22icxxt.iamarrows.com/how-airpods-active-noise-cancellation-transforms-your-listening-experience

It uses a mix of green and infrared LEDs paired with photodiodes to detect blood volume changes under your skin, giving you live heart rate data during workouts or all-day tracking. The optical sensor adjusts its sampling rate based on your activity level, so it saves battery when you're still and gets more frequent readings when you're moving. It's not medical-grade, but it does alert you if it detects an unusually high or low resting heart rate.