本标准确立了确定风扇倍频带声功率级的方法。声功率级是通过在环绕声源的测量表面上测量声强来确定的。提供了关于合适试验环境声学特性、测量表面和强度测量数量的指南。测试设置通常用于表示按照ANSI/AMCA 210安装的风扇的物理方向，也用于ANSI/AMCA 300。当满足方法的所有要求时，该方法是可重复的。本标准适用于所有类型和尺寸的风扇。它仅限于确定指定设置的空气声发射。在批准将其指定为美国国家标准的过程中，进行了一些小的编辑性修改。

This standard establishes a method of determining the octave band sound power levels of a fan. The sound power levels are determined using sound intensity measurements on a measurement surface that encloses the sound source. Guidelines are provided on suitable test environment acoustical characteristics, the measurement surface, and the number of intensity measurements. Test setups are designated generally to represent the physical orientation of fans as installed following ANSI/AMCA 210 and also used in ANSI/AMCA 300. The method is reproducible when all requirements of the method are met. This standard applies to fans of all types and sizes. It is limited to the determination of airborne sound emission for the specified setups. Minor editorial changes were made during the approval process for its designation as an American National Standard.