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Record Details

Record 38 of 27576
On source radiation. [power output computation]
External Online Source: doi:10.1121/1.384954
Author and Affiliation:
Levine, H.(Stanford University, Palo Alto, Calif., United States)
Abstract: The power output from given sources is usually ascertained via an energy flux integral over the normal directions to a remote (farfield) surface; an alternative procedure, which utilizes an integral that specifies the direct rate of working by the source on the resultant field, is described and illustrated for both point and continuous source distributions. A comparison between the respective procedures is made in the analysis of sound radiated from a periodic dipole source whose axis rotates in a plane, on a full or partial angular range, with prescribed frequency. Thus, adopting a conventional approach, Sretenskii (1956) characterizes the rotating dipole in terms of an infinite number of stationary ones along a pair of orthogonal directions in the plane and, through the farfield representation of the latter, arrives at a series development for the instantaneous radiated power, whereas the local manner of power calculation dispenses with the equivalent infinite aggregate of sources and yields a compact analytical result.
Publication Date: Oct 01, 1980
Document ID:
19810025846
(Acquired Nov 30, 1995)
Accession Number: 81A10250
Subject Category: ACOUSTICS
Document Type: Journal Article
Publication Information: Acoustical Society of America; vol. 68
Publisher Information: United States
Contract/Grant/Task Num: NCC2-55
Financial Sponsor: NASA; United States
Organization Source: Stanford Univ.; Palo Alto, CA, United States
Description: 7p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACOUSTICS; POINT SOURCES; RADIATION SOURCES; DIPOLES; INTEGRAL EQUATIONS
Imprint And Other Notes: Acoustical Society of America, Journal, vol. 68, Oct. 1980, p. 1199-1205.
Miscellaneous Notes: Oct. 1980, p. 1199-1205
Availability Source: Other Sources
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