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Cross-correlation of shipping noise: Refraction and receiver-motion effects

TitleCross-correlation of shipping noise: Refraction and receiver-motion effects
Publication TypeJournal Article
Year of Publication2019
AuthorsSkarsoulis E.K, Cornuelle BD
Volume145
Pagination3003-3010
Date Published2019/05
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000483973600034
Keywordsacoustic greens-function; acoustics; ambient noise; Audiology & Speech-Language Pathology; coherent; emergence rate; fields; ocean; spatial-correlation functions; wave-fronts
Abstract

The spatial correlation of a diffuse isotropic noise field generated from a uniform distribution of uncorrelated noise sources contains information about the time-domain Green's function ( TDGF) corresponding to propagation between the correlated locations. The distribution of noise in the ocean due to shipping-the prevailing origin of continuous low-frequency noise-is far from uniform. Besides the location of noise sources, the propagation conditions and the hydrophone locations have a significant influence on whether the TDGF can be reliably reconstructed through the cross-correlation procedure. A wave-theoretic scheme is implemented to simulate the cross-correlation function of a noise field in the time domain for arbitrary distributions of deterministic or random noise sources in refractive environments, and it is used to study the influence of propagation conditions and receiver motion on the efficiency of the cross-correlation procedure to obtain the TDGF from shipping noise. (C) 2019 Acoustical Society of America.

DOI10.1121/1.5108602
Student Publication: 
No
Research Topics: