Munjal, M. L. (1988) On the cut-on frequencies of a large round duct with azimuthal as well as radial partitions Journal of the Acoustical Society of America, 84 (5). pp. 1936-1939. ISSN 0001-4966
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Official URL: http://link.aip.org/link/jasman/v84/i5/p1936/s1
Related URL: http://dx.doi.org/10.1121/1.397249
Abstract
This letter deals with a three-dimensional analysis of circular sectors and annular segments resulting from the partitioning of a round (cylindrical) duct for use in an active noise control system. The relevant frequency equations are derived for stationary medium and solved numerically to arrive at the cut-on frequencies of the first few modes. The resultant table indicates among other things that azimuthal partitioning does not raise the cutoff frequency (the smallest cut-on frequency) beyond a particular value, and that radial partitioning is counterproductive in that respect.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Ducts; Three-dimensional Calculations; Numerical Solution; Noise; Circular Configuration; Acoustic Properties |
| ID Code: | 75272 |
| Deposited On: | 22 Dec 2011 06:26 |
| Last Modified: | 22 Dec 2011 06:26 |
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