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How do I stop my car AC fan from making noise? 

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The data presented indicates that this turbulence is the dominant source of noise above 1.5 kHz for the fan tested.
The experimental results indicate that the principal source of vehicle noise is related to the aerodynamic noise and the noise level has shown considerable increase when both the fan and compressor units are turned to ON positions.
We demonstrate the important role of the area of the sound-absorbing liner between fan Rotor and Stator ensuring significant noise reduction.
Proceedings ArticleDOI
R.H. Lyon, A.E. Bergles 
09 Mar 2004
9 Citations
This noise may have both tonal and random components and is strongly dependent on the way that the fan is placed in the unit and on how close its operation is to the design operating point.
In this paper, an improved algorithm for active control of fan noise is proposed.
The noise emission from the household refrigerator is also found to be lessened when the new fan units are installed.
Proceedings ArticleDOI
Antoine Moreau, Sebastien Guerin 
07 Jun 2010
15 Citations
Furthermore the acoustic output at the presence of parameter variations provides guidelines for the design-to-noise of fan components.
Journal ArticleDOI
Q Liu, Datong Qi, Yijun Mao 
01 Aug 2006
54 Citations
The method described and applied in this work provides a good qualitative prediction of the noise generation when designing a new fan, thus facilitating the choice of the lowest noise fan from several feasible alternatives.
The results indicate the limits of maximum noise reduction which manufacturers may expect using existing fan designs and also indicates the methods for achieving maximum noise reduction for these configurations.
A comparative study shows that the potential acoustic shielding effect is less favourable to the jet noise than to the downstream fan noise.

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