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Article | REF: BM4178 V2

Fan noise - Noise prediction and reduction methods

Author: Alain GUÉDEL

Publication date: April 10, 2021, Review date: April 29, 2021

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1. Sources of fan noise

1.1 Aerodynamic noise

Aerodynamic noise, due to the interaction of the flow with the fan's blades and fixed parts, is of primary interest here, as it predominates over the other two in the vast majority of cases. We'll come back to this in more detail in 2 .

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Sources of fan noise
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