本国际标准规定了在一个或多个反射面附近的基本自由场条件下，在包围噪声源的测量表面上测量声压级的方法，以计算噪声源产生的声功率级。它给出了测试环境和仪器的要求，以及获得表面声压级的技术，从表面声压级计算声源的声功率级，从而得出2级精度的结果。文件于2003年11月19日更新，最后一页包含勘误表。

This International Standard specifies a method for measuring the sound pressure levels on a measurement surface enveloping a noise source, under essentially free-field conditions near one or more reflecting planes, in order to calculate the sound power level produced by the noise source. It gives requirements for the test environment and instrumentation, as well as techniques for obtaining the surface sound pressure level from which the sound power level of the source is calculated, leading to results which have a grade 2 accuracy.Document updated on 11/19/03 to include errata on last page.