Unverified78% confidenceTradeoffTime unknown
定时关机功能对助眠是双刃剑：设了定时后半夜环境噪音（如同房间打鼾、走廊声）会因白噪音停止而把人吵醒，浅眠者应选支持整夜循环播放的机型
1
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78%
Confidence
Long-term
Relevance
-
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Unverified定时关机功能对助眠是双刃剑：设自动关机会在噪音停止后因环境反差惊醒浅睡者，长期助眠反而应选支持整夜连续播放（continuous play）的机型，定时更适合入睡快的人94% similarUnverified定时关机功能要看是否支持'连续播放'选项，部分低价机型强制1小时后关机，对整夜依赖白噪音的深度失眠者反而会在半夜噪音消失时惊醒90% similarUnverified睡眠敏感者不要买只有定时关机(如自动1小时后停)而无循环播放模式的机型，噪音突然中断会导致中途惊醒，应选支持整夜连续播放或渐弱(fade-out)的机型88% similarUnverified定时关机功能对整夜睡眠是隐患而非优点：噪音中途关闭会因环境音突然显现导致觉醒，整夜遮蔽应选支持'常开/8小时以上'档位，定时仅适合入睡快的人88% similarUnverified定时关机功能优先选可设「入睡渐弱」而非硬切断的机型，声音戛然而止容易惊醒浅眠者87% similar
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