Unverified75% confidenceDecision RuleTime unknown
定时关机功能优先选支持‘渐弱淡出’而非‘突然静音’的型号，声音骤停易惊醒浅睡者；带15/30/60/自定义多档定时的比只有单一定时的实用
1
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75%
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Long-term
Relevance
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Unverified带定时关机的机型分'渐弱淡出'和'突然静音'两种，突然静音会因声音落差惊醒浅眠者，助眠用途应选支持15/30/60分钟渐弱淡出的机型93% similarUnverified定时关机功能应支持'渐弱'而非'骤停'，骤停的声音突变反而会惊醒浅睡者；优选支持15/30/60分钟多档且带fade-out的机型93% similarUnverified定时关机功能应优先选支持'渐弱关闭'而非'突然静音'的机型，音量骤停造成的声音落差反而会在浅睡阶段惊醒用户90% similarUnverified定时关机功能必须选带'渐弱淡出'（fade-out）的机型：硬性到点静音会因声音的突然消失把浅睡者惊醒，理想的淡出时长应≥30秒；仅有'定时'而无淡出功能的产品在助眠场景是明显缺陷90% similarUnverified定时关机若只有固定档位（如30/60/90分钟）不如带渐弱淡出（fade-out）功能的机型，声音突然中断反而会惊醒浅眠者，淡出关机体验更好90% similar
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