本文件规定了在标准化条件下有效地确定、声明和验证液体泵或泵装置的空气噪声排放所需的所有信息（见4.1）。它规定了噪声测量方法以及试验所用的操作和安装条件。 噪声发射特性包括指定位置的发射声压级和声功率级。这些数量的确定对于 -声明噪声发射值，以及 -设计阶段噪声源控制的目的。 为了比较市场上液体泵发出的噪音，还需要确定这些数量。 本文件的使用确保了在所用基本空气噪声测量方法的准确度等级确定的规定限值内，空气噪声发射特性测定的再现性。根据本文件，噪声测量方法为工程方法（2级）和测量方法（3级）。 本文件不涉及液体泵产生的结构噪声和液体噪声的特征。 注:本文件在EN 809+A1中规定了泵（或泵装置）的噪声测量。

This document specifies all the information necessary to carry out efficiently and under standardized conditions the determination, declaration, and verification of the airborne noise emission of liquid pumps or pump units (see 4.1). It specifies the noise measurement methods and the operating and mounting conditions that shall be used for the test. Noise emission characteristics include emission sound pressure levels at specified positions and the sound power level. The determination of these quantities is necessary for — declaring the noise emission values, and — purpose of noise control at source at the design stage. The determination of these quantities is also necessary for comparing the noise emitted by liquid pumps on the market. The use of this document ensures the reproducibility of the determination of the airborne noise-emission characteristics within specified limits determined by the grade of accuracy of the basic airborne noise measurement method used. Noise measurement methods according to this document are engineering methods (grade 2) and survey methods (grade 3). This document does not deal with the characterization of the structure-borne sound and liquid-borne noise generated by liquid pumps. NOTE This document is specified in EN 809+A1 for noise measurements of the pump (or pump unit).