Sound Absorbing Wedge of Porous Tubed of Various Cross Sectional Shapes
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-19
Tubes made of a porous plastic are arranged in a wedge shape and are located at the top and bottom of an enclosure of a data processing system where the tubes absorb sound in the stream of cooling air that enters or leaves the enclosure at these positions. As is conventional, the wedge oriented with the uppermost and lowermost surfaces horizontal and with the point of the wedge directed inward so that air is split into two streams at the enclosure entrance and exit. A rigid back plate can be located on the horizontal surface of the wedge, and it provides a point for mounting the wedge in the processor enclosure. The plastic may be polyethylene. The tubes are preferably circular and about 1/2 to 5/8 inch in diameter and have a wall thickness of about 1/16 inch.