Unverified75% confidenceCautionTime unknown
预算有限只买入门降噪（低频衰减<25dB）意义不大：低端降噪对地铁/飞机噪音削弱有限，反而可能有底噪，此预算不如买被动隔音好的密封入耳式
1
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75%
Confidence
Medium-term (~90 days)
Relevance
-
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