Browse Prior Art Database

Low Noise Air Duct And Burning Debris Retainer for Electronic Enclosure

IP.com Disclosure Number: IPCOM000102736D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 41K

Publishing Venue

IBM

Related People

Brady, WA: AUTHOR [+3]

Abstract

This article describes a duct assembly for air-moving devices which enables the movement of large volumes of air through an electronic enclosure with the maximum possible reduction in acoustical noise emissions from the duct assembly.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Low Noise Air Duct And Burning Debris Retainer for Electronic Enclosure

      This article describes a duct assembly for air-moving devices
which enables the movement of large volumes of air through an
electronic enclosure with the maximum possible reduction in
acoustical noise emissions from the duct assembly.

      The duct assembly disclosed herein is shown in side view,
partly in section, in the drawing.  Air mover device noise source 10
pulls air through the openings 11 and 12 (not shown) in the bottom of
the duct assembly, then directs it into the electronics at 13.  A
corrugated acoustical wall 14 attached to the duct assembly is
located between the air-moving device 10 and the inlet to the duct so
as to destroy the line of sight between the noise source and the
inlet to the duct.

      The acoustical wall 14 is made of steel or some other very hard
surface and acts as an acoustical reflector for containing the noise
within the duct.  Sound absorbing foam 15 secured to the sides of
duct assembly members 16 serves to absorb the noise reflected from
the acoustical wall 14 and the noise transmitted through duct
assembly members 16. The acoustical wall 14 also is designed to
retain any burning electronic debris that drops through the air mover
10 from falling outside the duct.

      Disclosed anonymously.