[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

音效种类丰富但真正对婴儿有效的是模拟子宫环境的低频白噪音(如吸尘器声、心跳声、雨声),高频鸟鸣/音乐类反而可能刺激兴奋,选购时看是否有专门的『子宫音』或『粉红噪音』模式比看总数量更重要

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