Unverified70% confidenceTradeoffTime unknown
音量调节越细致（如无级调节）越好控噪，但会增加成本与操作复杂度，家用场景3档物理旋钮/按键足够，触屏调音对幼儿自主操作反而不友好
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70%
Confidence
Long-term
Relevance
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