Modal acoustic transducer array

An acoustic system composed of an array of transducers, which generates multiple acoustic radiation modes, is presented and shown to yield directional steered beam patterns when the modes are appropriately combined together. A single ring array which uses eight piston transducers with a common tail...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2006-05, Vol.119 (5_Supplement), p.3409-3409
Main Authors: Butler, John L., Butler, Alexander L.
Format: Article
Language:English
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Summary:An acoustic system composed of an array of transducers, which generates multiple acoustic radiation modes, is presented and shown to yield directional steered beam patterns when the modes are appropriately combined together. A single ring array which uses eight piston transducers with a common tail mass and a cylindrical array of five of these rings are used to illustrate the performance of such a modal acoustic array. A discussion of the operation of the transducer array with a common tail mass as well as the means for combining the modes is presented. Monopole, dipole, and quadrupole array modes are illustrated with finite-element models. These modes are then combined together to generate a true cardioid, a new very wide cardioid type, and a low sidelobe narrow caridioid-type beam pattern. Calculated and FEA results are compared with measurements. [Work supported by ONR.]
ISSN:0001-4966
1520-8524
DOI:10.1121/1.4786782