1.1 本标准定义了噪声测量程序，用于估计噪声产生设备用户的听力损失风险。它适用于地面车辆、飞机、船只和其他移动、可运输或固定设备。 1.2 本标准不推荐所讨论的任何应用的噪声暴露极限水平或标准。 1.3 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 本标准定义了用于估计噪声产生设备用户噪声引起听力损失风险的测量程序。它适用于地面车辆、飞机、船舶以及移动、可运输和固定设备。主要方法是分别测量每个正常操作条件下操作员耳朵位置的声级。这些水平可以与操作使用场景和暴露标准相结合，以定义噪声暴露的严重程度。这些数据也可用于定义听力保护要求或行政控制，以排除听力危害。 5.2 这种做法有以下局限性: 5.2.1 该机构使用现场便携式测量设备。 5.2.2 如果限值是根据本标准中测量的数量计算的，或者可以根据测量数据计算的，则该实践产生的数据可以与适用的标准或限值进行比较。

1.1 This standard defines noise measurement procedures for estimating the risk of hearing loss among users of noise producing equipment. It is applicable to ground vehicles, aircraft, watercraft, and other mobile, transportable, or stationary equipment. 1.2 This standard does not recommend noise exposure limit levels or criteria for any application discussed. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This standard defines measurement procedures for estimating the risk of noise-induced hearing loss among users of noise producing equipment. It is applicable to ground vehicles, aircraft, watercraft, and mobile, transportable, and stationary equipment. The primary approach is to separately measure the sound level at operator ear locations for each normal operating condition. These levels can be combined with operational use scenarios and exposure criteria to define noise exposure severity. The data can also be used to define hearing protection requirements or administrative controls to preclude hearing hazards. 5.2 The practice has the following limitations: 5.2.1 The practice uses field portable measurement equipment. 5.2.2 The practice produces data which may be compared with applicable criteria or limits if the limits are in terms of the quantities measured in this standard or which can be calculated from the measured data.