[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

纯手机麦克风+加速度计的睡眠App(如Sleep Cycle基础版)只能推断睡眠阶段,误差较大;若追求接近医疗级准确度,需选择支持血氧和心率变异性(HRV)的可穿戴联动方案

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