本标准规定了插入测量的真实耳中麦克风（MIRE）方法 失去主动和被动耳罩、头盔和通讯耳机，以及 规定了声学测试夹具（ATF）方法，用于测量有源和有源滤波器的插入损耗 被动耳塞、耳罩、头盔和通讯耳机。泥泞的方法是 适用于连续噪音环境，而ATF方法可同时用于这两种环境 连续噪声和高电平脉冲噪声测试信号。本标准包含以下信息: 仪器、校准和电声要求、声音测定程序 在有听力保护装置和无听力保护装置的情况下，耳朵内的压力水平，以及 计算相应的插入损耗值。该标准还描述了如何将 用MIRE法测量有源器件插入损耗的有源贡献 根据ANSI/ASA S12测量被动真实耳衰减。6.获得衰减 根据ANSI/ASA估算有源保护器声压级时使用的值 S12。68.还说明了报告数据的要求。

This standard specifies microphone-in-real-ear (MIRE) methods for the measurement of the insertion loss of active and passive circumaural earmuffs, helmets, and communications headsets, and specifies acoustic test fixture (ATF) methods for the measurement of the insertion loss of active and passive earplugs, earmuffs, helmets, and communications headsets. The MIRE methods are appropriate for use with continuous noise whereas the ATF methods may be used with both continuous noise and high-level impulsive noise test signals. The standard contains information on instrumentation, calibration, and electroacoustic requirements, procedures for determining sound pressure levels in the ear with and without the hearing protection devices in place, and procedures for calculating the corresponding insertion loss values. The standard also describes how to combine the active contribution of insertion loss for active devices measured using the MIRE method with the passive real-ear attenuation measured in accordance with ANSI/ASA S12.6 to obtain an attenuation value for use in estimating sound pressure levels for active protectors in accordance with ANSI/ASA S12.68. Requirements for reporting of the data are also described.