[KongchangAI]
Unverified82% confidenceDecision RuleTime unknown

白噪音/子宫音音箱有效频段应集中在低频(200-500Hz),能模拟母体环境;纯高频白噪音(如电视雪花声)对新生儿安抚效果差且可能刺激听觉

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Long-term
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