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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 ;...
The Ultimate Scientific and Technical Reference
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Hydraulic, aerodynamic and thermal machines
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Noise reduction
Current noise levels (statistical values)
Bibliography
Circuit calculation codes
Pressure fluctuations emitted by a pump (or valve) must be analyzed to determine the risk they represent for the circuit (stresses, vibration levels, natural frequencies, forces exerted on the structure).
As we have already seen
Standardization
All aspects of testing standards are covered in depth in the reference . We have extracted the most important passages:
Airborne noise measurement
The Ultimate Scientific and Technical Reference
