Method for Reducing Sound from an Enclosure Mounted Fan

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Axial fans are widely used for electronic cooling, but their use often results in unwanted noise. An axial fan is mounted to an enclosure, the sound radiation pattern becomes monopole-like since only one side of the fan is exposed to the exterior space; thus it radiates more efficiently than the same fan in free space.

Purdue University researchers have developed a novel scheme that significantly reduces the sound power radiated by an axial fan mounted to a surface of an enclosure.

Advantages:
-Significantly reduces noise

Potential Applications:
-Electronics cooling
May 17, 2006
NATL-Patent
China
ZL 200680018177.8
Feb 23, 2011

May 17, 2006
NATL-Patent
Japan
4685932
Feb 18, 2011

May 9, 2006
Utility Patent
United States
7,762,373
Jul 27, 2010

May 17, 2006
NATL-Patent
South Korea
10-0948310
Mar 11, 2010

May 17, 2006
PCT-Patent
WO
(None)
(None)

May 25, 2005
Provisional-Patent
United States
(None)
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