Abstract
The creation of quiet zones in a diffuse sound field due to a multipole spherical primary source by means of a radially vibrating surface set in the side of a rigid sphere (secondary source) is investigated in this article. The formulation utilizes the appropriate wave field expansions along with the translational addition theorems for spherical wave functions to develop a closed-form solution in the form of an infinite series. The numerical results reveal that using a baffled spherical piston model as a secondary source instead of a monopole control source will obviously improve the sound minimization efficiency of such noise-control systems in all cases, especially for a dipolar primary source.
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From Akusticheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 51, No. 6, 2005, pp. 709–720.
Original English Text Copyright © 2005 by Azarpeyvand.
The text was submitted by the author in English.
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Azarpeyvand, M. Active noise cancellation of a spherical multipole source using a radially vibrating spherical baffled piston. Acoust. Phys. 51, 609–618 (2005). https://doi.org/10.1134/1.2130891
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DOI: https://doi.org/10.1134/1.2130891