ISO 4412-3:1991 Preview
Hydraulic fluid power -- Test code for determination of airborne noise levels -- Part 3: Pumps -- Method using a parallelepiped microphone array
This standard was last reviewed and confirmed in 2017. Therefore this version remains current.
This part closely follows the methods described in the two other parts, but allows the use of alternative pump mounting and drive configurations which are simpler and cheaper to implement in an anechoic chamber. May also be applied to test motors.
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