Unverified92% confidenceDecision RuleTime unknown
泡棉耳塞的实际降噪效果高度依赖正确佩戴手法：需将耳塞充分搓细后，拉直耳道插入并按压保持约30秒待其膨胀——操作不到位将导致实际降噪量远低于标称NRR值
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Unverified被动耳塞的降噪值高度依赖佩戴深度：泡棉需搓细后塞入并等待膨胀密封，若只塞在耳道口，实际隔音可能损失10dB以上，达不到标称NRR90% similarUnverified隔音效果80%取决于佩戴手法而非NRR标称值：泡棉需先搓细成条，塞入后按住耳道口10秒待其膨胀密封，未膨胀到位实测降噪可能损失一半89% similarUnverified海绵耳塞正确佩戴需搓细→拉耳廓→塞入→按压30秒等待膨胀，直接塞入会导致降噪失效，标称NRR无法兑现89% similarUnverified需要正确搓细后深入耳道等待膨胀才能达到标称隔音值，佩戴方法不对会导致实际降噪远低于标称值86% similarUnverified泡棉耳塞需在膨胀前（搓细后10-20秒内）深插入耳道再等待回弹，插入过浅会导致标称降噪值大幅损失，佩戴方式错误比选错型号影响更大86% similar
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