Localizing scatterers from surf noise cross correlations

TitleLocalizing scatterers from surf noise cross correlations
Publication TypeJournal Article
Year of Publication2017
AuthorsLi J., Gerstoft P, Gao D.Z, Li G.F, Wang N.
JournalJournal of the Acoustical Society of America
Date Published2017/01
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000395308700012
Keywordsgreens-function; ocean; seismic interferometry

The backscattered travel-time structure is obtained by cross-correlating air-acoustic ocean surf noise recorded on microphone pairs (separation similar to 2m) on the beach. The scatterer is a 20 cm radius Polyvinyl chloride pipe 2.5m landside of the microphone array. Arrivals corresponding to the time-difference (travel-time difference between two scatterer-receiver paths) and scattered (travel time for receiver-scatterer-receiver path) waves emerge in the cross-correlation functions in a backscattering configuration. Theoretically, only a microphone pair is needed to locate the scatterer using the time-difference and scattered travel times. Localization of the scatterer is demonstrated with the microphone array on the beach. (C) 2017 Acoustical Society of America

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