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Cross-correlation sensitivity kernels with respect to noise source distribution

TitleCross-correlation sensitivity kernels with respect to noise source distribution
Publication TypeJournal Article
Year of Publication2020
AuthorsSkarsoulis E.K, Cornuelle BD
Date Published2020/01
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000517432900001
Keywordsacoustics; ambient noise; Audiology & Speech-Language Pathology; coherent wave-fronts; emergence rate; fields; greens-function; interferometry; ocean; spatial-correlation functions

The cross correlation of the underwater noise field recorded at two receivers conveys information about the time-domain Green's function between the two locations, provided that sufficient energy is channeled into the acoustic paths connecting these. The efficiency of this procedure depends on the locations and characteristics of the receivers and noise sources, as well as on the refraction properties of the ocean sound channel. The sensitivity of the finite-frequency noise cross-correlation function with respect to the location and amplitude of the noise sources is studied here, taking into account the refractive features of the ocean environment. The sensitivity kernel describing changes in the cross-correlation envelope due to changes in the noise source distribution is used to highlight noise-source locations with maximum potential impact on the cross-correlation output.

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