The attenuation of sound in lined rectangular ducts containing uniform flow

✍ Scribed by M.A. McCormick

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 267 KB
• Volume: 39
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1016/s0022-460x(75)80207-0

✦ Synopsis

Many papers have been published on the subject of attenuation in lined ducts. One case for which results have not been published, however, and which is pertinent to several applications is that of a rectangular duct lined on all walls and containing a uniform flow. This is a relatively simple extension of the two-dimensional case and the result can be expressed analytically. Comparisons are made between the attenuations in a twodimensional duct and a rectangular duct lined on two walls, between the attenuations produced by a rectangular duct lined on two walls and the attenuations produced when all four walls are lined and, lastly, between some measured attenuations for rectangular ducts lined on two and four walls.