iOS 13 is adding this and displaying the data in the health app. Though I think it's just an average headphone level, not moment by moment. Also unsure how they

iOS 13 is adding this and displaying the data in the health app. Though I think it's just an average headphone level, not moment by moment. Also unsure how they're calibrating it for non-apple headphones, and or AirPods gunned up by earwax.