Browse Prior Art Database

Noise-Reducing V-Bracket Fan Mounting

IP.com Disclosure Number: IPCOM000040193D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 96K

Publishing Venue

IBM

Related People

Bornhorst, RJ: AUTHOR

Abstract

Fans are a primary source of noise in products. These sound levels are often too loud for office environments. When cooling requires multiple fans, the sound levels increase accordingly. When two fans are mounted at an angle relative to one another, rather than in the same plane, a cancellation of sound is the result. Noise reduction is accomplished with no additional hardware cost. (Image Omitted) Two fans 1 adjacent to each other are mounted on a V-bracket 2 at an angle 3 relative to one another (Fig. 1). This angle 3 causes exhausted air/noise of one fan to move into the path of exhausted air/noise of the adjacent fan (Fig. 2). This interference between exhausted air/noise causes a cancellation effect of noise which results in lower sound power levels.

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Noise-Reducing V-Bracket Fan Mounting

Fans are a primary source of noise in products. These sound levels are often too loud for office environments. When cooling requires multiple fans, the sound levels increase accordingly. When two fans are mounted at an angle relative to one another, rather than in the same plane, a cancellation of sound is the result. Noise reduction is accomplished with no additional hardware cost.

(Image Omitted)

Two fans 1 adjacent to each other are mounted on a V-bracket 2 at an angle 3 relative to one another (Fig. 1). This angle 3 causes exhausted air/noise of one fan to move into the path of exhausted air/noise of the adjacent fan (Fig. 2). This interference between exhausted air/noise causes a cancellation effect of noise which results in lower sound power levels. The angle is optimized to produce the most sound reduction without causing significant backpressure to the air flow path and the resulting decrease in volume. For fans less than 150 mm in diameter, a 2 dB reduction was achieved.

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