Extraction of scattering echo time by surf noise background subtracted autocorrelation

TitleExtraction of scattering echo time by surf noise background subtracted autocorrelation
Publication TypeJournal Article
Year of Publication2017
AuthorsLi X.L, Chi J., Gao D.Z, Li J., Wang N.
JournalJournal of the Acoustical Society of America
Volume142
PaginationEL1-EL6
Date Published2017/07
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000405656700001
Keywordsambient noise; field; greens-function
Abstract

Extracting echo time is an important step in scatterer detection by ambient noise, while in general the scattered signal is weak and submerged in the background. An experiment of a Polyvinyl chloride pipe in a coastline surf noise environment is designed to extract the pipe's echo time by noise autocorrelation. As expected, the scattered wave of the pipe is submerged in an autocorrelation signal. A method called background subtracted autocorrelation is proposed in this paper, which can retrieve scattered echo time from autocorrelation signal effectively. And the biggest relative error of extracted echo time is less than 2% in the experiment. (C) 2017 Acoustical Society of America

DOI10.1121/1.4989996
Student Publication: 
No
Research Topics: 
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