[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

卧室睡眠使用应选低速档噪音≤30分贝的直流变频(DC)风扇,交流(AC)电机风扇最低档普遍在40分贝以上,静音效果差一档

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90%
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Long-term
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