Unverified78% confidenceTradeoffTime unknown
被动降噪对低频噪音（<500Hz，如飞机引擎、地铁轰鸣）效果有限，主要衰减中高频；带娃坐飞机若担心引擎低频轰鸣，被动耳罩体验有限，但因安全考量仍应选被动式而非给幼儿用ANC
1
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78%
Confidence
Long-term
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