scope:

This Standard specifies all the information necessary to carry out efficiently and under standardized conditions the determination, declaration, and verification of the airborne noise emission of pumps or pump units. 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/or 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 pumps on the market.

The use of this Standard 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 Standard are engineering methods (Grade 2 of accuracy) and survey methods (Grade 3 of accuracy).

This Standard does not deal with the characterization of the structure-borne sound and liquid-borne noise generated by pumps.

NOTE The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 20361 : 2019 Liquid pumps and pumps units - Noise test code - Grades 2 and 3 of accuracy (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.