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dc.contributor.authorGodin, Oleg A.
dc.date1 February 2018
dc.date.accessioned2019-01-24T17:33:04Z
dc.date.available2019-01-24T17:33:04Z
dc.date.issued2018-02-01
dc.identifier.citationGodin, Oleg A. "Acoustic noise interferometry in a time-dependent coastal ocean." The Journal of the Acoustical Society of America 143.2 (2018): 595-604.en_US
dc.identifier.urihttp://hdl.handle.net/10945/61010
dc.descriptionThe article of record as published may be found at http://dx.doi.org/10.1121/1.5022287en_US
dc.description.abstractInterferometry of underwater noise provides a way to estimate physical parameters of the water column and the seafloor without employing any controlled sound sources. In applications of acoustic noise interferometry to coastal oceans, the propagation environment changes appreciably during the averaging times that are necessary for the Green's functions to emerge from noise cross-correlations. Here, a theory is developed to quantify the effects of nonstationarity of the propagation environment on two-point correlation functions of diffuse noise. It is shown that temporal variability of the ocean limits from above the frequency range, where noise cross-correlations approximate the Green's functions. The theoretical predictions are in quantitative agreement with results of the 2012 noise interferometry experiment in the Florida Straits. The loss of coherence at high frequencies constrains the passive acoustic remote sensing to exploiting a low-frequency part of measured noise cross-correlations, thus limiting the resolution of deterministic inversions. On the other hand, the passively measured coherence loss contains information about statistical characteristics of the ocean dynamics at unresolved spatial and temporal scales.en_US
dc.description.sponsorshipNational Science Foundationen_US
dc.description.sponsorshipResearch Initiation Program of the Naval Postgraduate Schoolen_US
dc.format.extent10 p.en_US
dc.publisherAcoustical Society of Americaen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleAcoustic noise interferometry in a time-dependent coastal oceanen_US
dc.typeArticleen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)en_US
dc.contributor.departmentPhysicsen_US
dc.description.funderOCE1657430en_US


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