Unverified78% confidenceFactTime unknown
双向语音对讲的实用性取决于延迟与音质，专用屏幕型延迟通常低于1秒可实时安抚，WiFi型延迟受网络影响可能达2-3秒；带背景白噪音/催眠曲播放功能的机型可减少一台哄睡设备
1
Sources
78%
Confidence
Medium-term (~90 days)
Relevance
-
First Seen
Sources
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Unverified定时关机应支持渐弱淡出(fade-out)而非硬性突然静音，突然断声会造成听觉落差惊醒用户；优选带15/30/60/90分钟多档位或全夜连续播放的机型82% similarUnverified助眠音频设备定时关机应支持渐弱（fade-out）而非直接切断，突然静音会造成环境声音反差惊醒，建议选带30/60/90分钟且末段音量渐弱功能的机型81% 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81% similarUnverified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81% similarUnverified定时关机建议选支持15/30/60/90分钟多档且带渐弱淡出（fade-out）的机型，突然断音容易惊醒浅眠者，渐弱设计能平滑过渡到无声80% similar
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