Calibration of broadband active acoustic systems using a single standard spherical target Stanton, Timothy K. Chu, Dezhang 2008-08-13T14:35:32Z 2008-08-13T14:35:32Z 2008-07
dc.description Author Posting. © Acoustical Society of America, 2008. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 124 (2008): 128-136, doi:10.1121/1.2917387. en
dc.description.abstract When calibrating a broadband active acoustic system with a single standard target such as a sphere, the inherent resonances associated with the scattering by the sphere pose a significant challenge. In this paper, a method is developed which completely eliminates the source of resonances through isolating and exploiting the echo from the front interface of a sphere. This echo is relatively insensitive to frequency over a wide range of frequencies, lacking resonances, and is relatively insensitive to small changes in material properties and, in the case of spherical shells, shell thickness. The research builds upon the concept of using this echo for calibration in the work of Dragonette et al. [J. Acoust. Soc. Am. 69, 1186–1189 (1981)]. This current work generalizes that of Dragonette by (1) incorporating a pulse compression technique to significantly improve the ability to resolve the echo, and (2) rigorously accounting for the scattering physics of the echo so that the technique is applicable over a wide range of frequencies and material properties of the sphere. The utility of the new approach is illustrated through application to data collected at sea with an air-filled aluminum spherical shell and long broadband chirp signals (30–105 kHz). en
dc.description.sponsorship This work was supported by the U.S. Office of Naval Research Grant Nos. N00014-04-1-0475 and N00014- 04-1-0440 and the J. Seward Johnson Chair at WHOI. en
dc.format.mimetype application/pdf
dc.identifier.citation Journal of the Acoustical Society of America 124 (2008): 128-136 en
dc.identifier.doi 10.1121/1.2917387
dc.language.iso en_US en
dc.publisher Acoustical Society of America en
dc.subject Acoustic resonance en
dc.subject Acoustic wave scattering en
dc.subject Calibration en
dc.subject Echo en
dc.subject Pulse compression en
dc.title Calibration of broadband active acoustic systems using a single standard spherical target en
dc.type Article en
dspace.entity.type Publication
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relation.isAuthorOfPublication.latestForDiscovery 9b4f4f6d-0551-4b7a-a128-7976b273a179
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