Unverified75% confidenceDecision RuleTime unknown
内置音源分为循环采样(loop)和实时生成(non-repeating)两类，loop型通常10-30秒一循环，安静环境下能听出重复接缝反而影响入睡，睡眠敏感者应选择无缝循环或长采样(≥3分钟)的型号
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Unverified循环音频式机型需确认音源为无缝loop(≥数分钟长采样)，廉价机型常用10-30秒短循环，睡前专注时能明显听到重复接缝反而干扰入睡90% similarUnverified对循环音敏感的人应选音频循环片段≥10分钟或标注'无缝循环/non-looping'的机型，廉价机型循环片段常仅30秒至1分钟，安静环境下能明显听出重复导致反而睡不着90% similarUnverified数字采样款要看单个音效的循环时长，短于30秒的loop长期听会因重复感产生烦躁，睡眠助眠款应选长循环或无缝loop设计90% similarUnverified助眠音乐仪的音源分为'循环采样'和'无缝生成'两类，循环采样的音频通常30秒-2分钟一循环，敏感人群会察觉到接缝导致觉醒；预算充足优先选标注'gapless loop'或'无缝循环'的机型89% similarUnverified睡眠助眠优先选带无缝循环(seamless loop)音源的机型，劣质机型每30-60秒会出现明显的循环断点声，反而会在浅睡期惊醒用户88% similar
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