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Close range ship noise cross correlations with a vector sensor in view of geoacoustic inversion

2016Journal article Open access
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dc.contributor.authorWu Yanqun
dc.contributor.authorSantos, Ana Bela
dc.contributor.authorFelisberto, P.
dc.contributor.authorJesus, S. M.
dc.date.accessioned2017-04-07T15:57:21Z
dc.date.available2017-04-07T15:57:21Z
dc.date.issued2016
dc.description.abstractDistant ship noise has been utilized for geoacoustic inversion and ocean monitoring for many years. In a shallow water experiment, Makai 2005, a 4-element acoustic vector sensor array was deployed at the stern of the research vessel R/V Kilo Moana. The recorded engine noise of R/V Kilo Moana during its dynamic positioning was analyzed by the DEMON (Detection of Envelope Modulation on Noise) method. The strongest modulation frequency band of the ship noise was found by a group of band-pass filters for further data processing. Multipath arrivals in the vertical particle velocity have higher signal-to-noise ratios than those in the horizontal particle velocities because of steep arrival directions. By exploiting this advantage, the cross-correlation of broadband ship noise between the pressure and the vertical particle velocity can be used for multipath information exploration. Since ship noise is often characterized as continuous broadband noise plus strong tonal noise, the cross-correlation of tonal noise would dominate that of broadband noise, and consequently cover the multipath arrival pattern. Therefore, spectral weighting functions are applied in order to reduce the noise contamination and ensure sharp multipath peaks in the cross-correlation. For engine noise emitted by the dynamically positioned ship, a short correlation time of 0.4s was used in order to keep the time delay fluctuation details of multipath arrivals. Clear multiple arrivals are seen in the cross-correlation of different arrivals, and verified by the ray tracing program TRACEO. The results demonstrate the potential of only one acoustic vector sensor in applications of source localization and geoacoustic inversion.
dc.identifier.isbn978-1-4673-9978-4
dc.identifier.otherAUT: SJE00662; ABS01444;
dc.identifier.urihttp://hdl.handle.net/10400.1/9688
dc.language.isoeng
dc.peerreviewedyes
dc.publisherIEEE
dc.relation.isbasedonWOS:000390300800131
dc.titleClose range ship noise cross correlations with a vector sensor in view of geoacoustic inversion
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceHarbin, R. P. CHINA
oaire.citation.title2016 IEEE/OES China Ocean Acoustics Symposium (COA)
person.familyNameSantos
person.familyNameFelisberto
person.familyNameJesus
person.givenNameAna Bela
person.givenNamePaulo
person.givenNameSergio
person.identifier79549
person.identifier.ciencia-idF510-CA29-EBD0
person.identifier.ciencia-idD411-CBA8-85B8
person.identifier.orcid0000-0003-2041-2400
person.identifier.orcid0000-0001-7542-4332
person.identifier.orcid0000-0002-6021-1761
person.identifier.ridM-9474-2013
person.identifier.scopus-author-id57190983532
person.identifier.scopus-author-id6508039890
person.identifier.scopus-author-id7003729485
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication8b54b8d9-3963-4e2b-b40b-7d5c5260ac17
relation.isAuthorOfPublication6574c278-a803-4dbe-9140-4cd8272027db
relation.isAuthorOfPublicatione0226ece-3767-4beb-ab80-868e8897c14a
relation.isAuthorOfPublication.latestForDiscoverye0226ece-3767-4beb-ab80-868e8897c14a

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