to an algorithm that classifies the signal every 30 seconds (epochs) into one of four stages: Awake, REM sleep, Deep sleep, or Core sleep. This classificati...

https://www.apple.com/jp/healthcare/docs/site/Estimating_Sleep_Stages_from_Apple_Watch_Sept_2023.pdf

069-0135-K_SPEC, REGULATED SUBSTANCES_Sept2018.pages Apple Regulated Substances Specification 069-0135-K This document contains proprietary information of A...

https://www.apple.com/jp/environment/pdf/Apple_Regulated_Substances_Specification_Sept2018.pdf