本文件适用于主动降噪（ANR）耳罩。它规定了 施工、设计、性能、标记和用户信息与包含活动 降噪设施。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document is applicable to active noise reduction (ANR) earmuffs. It specifies requirements on construction, design, performance, marking and user information related to the inclusion of the active noise reduction facility.All current amendments available at time of purchase are included with the purchase of this document.