AirPods Pro 3: PPG sensor, IR pulses 256×/s — some users report discomfort
AirPods Pro 3: Design change adds PPG sensor — some users report discomfort Apple's AirPods Pro (3rd generation) introduce a custom photoplethysmography (PPG) sensor that emits invisible infrared light pulsed at 256 times per second to measure blood flow and heart rate through the ear canal. This brings heart-rate and cardio-tracking features into the earbuds, working alongside motion sensors and on-device processing. What the sensor does The PPG sensor pulses IR light 256×/s to detect blood volume changes in the ear canal. Provides live heart rate data during workouts and can contribute to calorie and activity tracking. User feedback Some users have reported discomfort or fit issues related to the new case/design and how the earbuds sit. Reports are mixed; Apple promotes an improved fit for active use, but individual…
