GB/T 39959-2021Liquid pumps and pump units - Noise test code - Grades 2 and 3 of accuracy (English PDF)

1 Scope

This standard specifies the relevant information for the effective implementation of the noise test of liquid pumps or pump units (see 4.1) and the air emitted by them under standard conditions.

Noise measurement, labeling and verification methods, as well as liquid pump or pump unit noise measurement methods, test operation and equipment conditions.

Noise emission characteristics include sound power level and emission sound pressure level at a specified point. The determination of these quantities can be used to.

---Mark the noise emission value;

---Control of noise sources in the design stage.

The measurement of these quantities is also necessary to compare with the noise of liquid pumps on the market.

The application of this standard can ensure the reproducibility of the measurement of air noise emission characteristics within a certain limit, which is determined by the Air Noise Measurement Institute.

The accuracy level of the method is used to determine. The noise measurement methods covered by this standard include engineering method (level 2) and simplified method (level 3).

This standard does not apply to structural and liquid-conducted liquid pump noise.

Note. For the noise measurement of pumps or pump units specified in this standard, see EN809 A1.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 3767-2016 Acoustic sound pressure method to determine the sound power level and sound energy level of the noise source. Approximate free field above the reflective surface.

Process method (ISO 3744.2010, IDT)

GB/T 3768-2017 Acoustic sound pressure method is used to determine the sound power level and sound energy level of noise sources using the envelope measurement surface above the reflecting surface

The simple method (ISO 3746.2010, IDT)

GB/T 6881.2-2017 Acoustic sound pressure method to determine the sound power level and sound energy level of noise sources. Small movable sound sources in the reverberation field

Engineering method hard wall test room comparison method (ISO 3743-1.2010, IDT)

GB/T 33925.1-2017 General terms, definitions, quantities, characters and units for liquid pumps and their devices Part 1.Liquid pumps (ISO 17769-1.2012, IDT)

GB/T 33925.2-2018 General terms, definitions, quantities, characters and units for liquid pumps and their devices Part 2.Pump system (ISO 17769-2.2012, IDT)

ISO 3743-2.2018 Acoustic Sound Pressure Method for the Determination of Sound Power Level of Noise Sources Engineering Law No. 2 of Small Movable Sound Sources in Reverberation Fields

Part. Dedicated Reverberation Laboratory Method (Acoustics-Determination of Sound Power Levels of Noise Sources Using soundpressure-Engineeringmethodsforsmal,movablesourcesinreverberantfields-Part 2.Meth- odsforspecialreverberationtestrooms)

ISO 4871.1996 Acoustics-Declaration and Verifi- cationofnoiseemissionvaluesofmachineryandequipment)

ISO 9614-1.1993 Acoustic Sound Intensity Method Determination of Sound Power Level of Noise Sources Part 1.Discrete Point Measurement Method (Acoustics-De- terminationofsoundpowerlevelsofnoisesourcesusingsoundintensity-Part 1.Measurementatdis- cretepoints)

GB/T 13929 | JB/T 13977 | GB/T 7782 | GB/T 26115 | GB/T 14794 | […]