标准摘要
[中文适用范围]： 本文档涉及主动降噪 (ANR) 耳罩。 它规定了确定有源插入损耗的测试方法和推导总衰减的计算程序。 为此，还必须了解被动模式下的声音衰减值，并根据 ISO 4869-1 确定。 这些方法适用于稳定的噪声暴露，不适用于包含脉冲成分的噪声。 测试方法使用指定的无源 (REAT) 和有源真耳麦克风 (MIRE) 测量来考虑佩戴者和设备之间的声学交互 [外文原描述]： This document is concerned with active noise reduction (ANR) earmuffs. It specifies the test methods for the determination of the active insertion loss and calculation procedures for deriving the total attenuation. For this aim, the values of sound attenuation in the passive mode also have to be known and are determined according to ISO 4869‑1. These methods are intended for steady noise exposures and are not applicable to noises containing impulsive components. The test methods account for the acoustical interaction between the wearer and the device using measurements of passive (REAT) and active microphone-in-real-ear (MIRE) measurements as specified in ISO 4869‑1 and ISO 11904‑1, respectively.
英文名称Acoustics — Hearing protectors — Part 6: Determination of sound attenuation of active noise reduction earmuffs