Cooling fan noise reduction apparatus, systems, and methods

Details Cooling fan noise reduction apparatus, systems, and methods Cooling fan noise reduction apparatus, systems, and methods

2007-11-27

2007-11-27

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

C416S500000

Reexamination Certificate

active

11241259

ABSTRACT:
Apparatus, systems, and methods may operate to distribute acoustic spectral energy associated with a primary blade-passing frequency tonal component of fan noise and with harmonics thereof. The energy may be spectrally distributed by irregularly spacing a plurality of fan blades or stationary structures associated with the fan, or both. The stationary structures may be capable of being pressure-coupled to each one of the plurality of fan blades as each fan blade passes by each one of the stationary structures. Other embodiments are described and claimed.

REFERENCES:
patent: 6047765 (2000-04-01), Zhan
patent: 6488472 (2002-12-01), Miyazawa
patent: 6883233 (2005-04-01), Song et al.
“FENESTRON™ Type Tail Rotor, Colibri EC 120B”, [online]. Eurocopter. [archived on Feb. 18, 2004]. Retrieved from the Internet: <URL: http://web.archive.org/web/*/http://www.eurocopter.com/site/FO/scripts/siteFO—contenu.php?arbo=2&noeu—id=6&lang=EN>, 4 pgs.
“ORIX® Fan Cooling Fans”, [online]. Oriental Motor, © 2003. [retrieved on Aug. 22, 2005]. Retrieved from the Internet: <URL: http://www.orientalmotor.com/products/fan/index—html.htm>, 2 pgs.
“Standard ECMA-74—Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment”, [online]. ECMA Standards, Dec. 2003. [retrieved on Aug. 22, 2005]. Retrieved from the Internet: <URL: http://www.ecma-international.org/publications/standards/Ecma-074.htm, 18 pgs.
Akaike, S., et al., “Study of Rotational Noise Reduction for Axial Flow Fan—(Analysis and Estimation of Secondary Fan-Noise Component)”,ISME International Journal, Series B, 39(3), (1996), 590-596.
Turner, M., et al., “All You Need to Know About Fans”, [online]. Electronics Cooling, May 1996. [archived on Sep. 7, 2005]. Retrieved from the Internet: <URL: http://web.archive.org/web/20050907213501/ http://www.electronics-cooling.com/ Resources/EC—Articles/MAY96/ may96—01.htm>, 8 pgs.

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