标准摘要
[中文适用范围]： 此文件规定了验证近一个或多个反射面的声学自由场环境的方法。资格认证的目标是确定环境修正值，该值用于在测量包封噪声源（机械或设备）表面的声压级以确定噪声源的声音功率级或声音能量级时，校正反射声的影响。实际上，所确定的 值将同时取决于测试环境中反射声以及用于确定 的测量面的形状和尺寸。对于本文件及其引用的文件而言，在不同测量面上确定的不同 值之间的差异被认为是包含在试验方法规定的测量不确定度中的。 [外文原描述]： This document specifies methods for qualifying an environment that approximates to an acoustic free field near one or more reflecting planes. The goal of the qualification is to determine the environmental correction , which is used to correct for reflected sound when determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping the noise source (machinery or equipment) in such an environment. In practice, the value determined will be a function of both the reflected sound from the test environment and the shape and size of the measurement surface used for the determination. For the purposes of this document and the documents that refer to it, the differences between values determined with different measurement surfaces are assumed to be included in the stated measurement uncertainty for the test method.
英文名称Acoustics — Test methods for the qualification of the acoustic environment — Part 2: Determination of the environmental correction