The earplugs, made by a firm that 3M bought in 2008, were distributed to troops during the conflicts in Afghanistan and Iraq, but the servicemen claim that the noise mufflers failed to prevent a loss of hearing.

这些耳塞由3M公司在2008年收购的一家公司制造，随后在阿富汗和伊拉克冲突期间分发给了部队，但军人们声称这些消声耳塞无法防止听力损失。