包括编程用于执行标准中规定的计算的信息电子表格。本标准规定了三种方法，按使用复杂性和潜在可能性的升序排列 准确度，用于估计在安装听力保护器时有效的声压级 穿坏的这些程序的应用反过来需要估计耳蜗的实际耳衰减 用于用户组的设备，以及对用户暴露的噪声水平的估计。这个 最简单的方法是噪声级降低统计数据，用于A加权（NRSA），可以 直接从A加权声级或声暴露估计值中减去。 更准确的 程序是噪声级降低统计图（NRSG），需要测量 A和C加权声级或曝光，以及一组图形数据的应用。 可能最准确的方法是利用倍频带真耳的倍频带方法 衰减和噪声测量数据。每个简化评级，即NRSA和NRSG，都是 以第80和第20百分位计算，以反映预期的性能范围 基于衰减数据的变化。

Includes informational spreadsheet programmed to perform the calculations specified in the standard.This standard specifies three methods, in ascending order of complexity of use and potential accuracy, for the estimation of the sound pressure levels that are effective when a hearing protector is worn. The application of the procedures in turn requires an estimate of the real-ear attenuation of the device for groups of users and an estimate of the noise levels to which the users are exposed. The simplest method is the Noise Level Reduction Statistic for use with A-weighting (NRSA) that can be directly subtracted from an A-weighted sound level or sound exposure estimate. A more accurate procedure is the Noise Level Reduction Statistic, Graphical (NRSG) that requires measurements of both the A- and C-weighted sound levels or exposures, and the application of a set of graphical data. Potentially the most accurate approach is the octave-band method utilizing the octave-band real-ear attenuation and noise measurement data. Each of the simplified ratings, the NRSA and NRSG, is to be computed at both the 80th and 20th percentiles to reflect the range of performance to be expected based on the variation in the attenuation data.