Unverified80% confidenceCautionTime unknown
定时关机反而可能吵醒对声音敏感者——白噪音停止时的突然安静会造成'声音落差'惊醒，浅眠者应选支持整晚常开（无定时或可关闭定时）的款式
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80%
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Long-term
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