9. Noise reduction
9.1 Noise reduction at source
In this section, we will focus on the two main lines found on a pump:
the line at rotational frequency N of mechanical origin ;
the line at frequency n r N of hydraulic origin.
9.1.1 Line at frequency N and its harmonics
Its main origins are :
mechanical and hydraulic unbalance...
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Noise reduction
Current noise levels (statistical values)
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