Unverified85% confidenceTradeoffTime unknown

隔音量越高与舒适度越矛盾：慢回弹PU泡棉塞NRR最高(32-33)但膨胀顶耳膜久戴胀痛，硅胶法兰塞舒适易插但降噪普遍低3-6dB，通勤日常NRR 25-28的硅胶塞体验更好

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被动隔音耳塞category

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Unverified隔音等级越高（NRR33），海绵体积越大膨胀越强，长时间佩戴胀痛感越明显；日常通勤/办公降噪NRR 22-27dB的硅胶塞更适合8小时以上佩戴84% similar Unverified降噪值高低是隔音强度与佩戴异物感的权衡：NRR33的深插入泡棉隔音最强但久戴耳道胀痛，日常降噪NRR25-28配合浅插入更适合8小时办公83% similar Unverified低频噪音（马路车流、鼾声）比高频更难隔绝，慢回弹PU海绵耳塞对低频衰减优于硅胶，硅胶三节翼款对高频（说话声、键盘声）更有效82% similar

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