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dc.contributor.authorFoote, Kenneth G.
dc.date.accessioned2012-09-25T13:10:31Z
dc.date.available2012-09-25T13:10:31Z
dc.date.issued1996
dc.identifier.citationThis report is not to be cited without prior reference to the authorno_NO
dc.identifier.urihttp://hdl.handle.net/11250/105536
dc.description.abstractIt has been suggested that modes of vibration of solid elastic spheres, such as those used in the calibration of echo sounder systems, can be affected by the manner of suspension. This hypothesis is investigated in the context of reported experimental calibration trials with the SIMRAD EK500/120-kHz echo sounder. In these, as many as four different spheres were used: 23- and 30.05- mm-diameter spheres composed of electrical grade copper and 33.2- and 38.1-mm diameter spheres composed of tungsten carbide with 6% cobalt binder. Theoretical target strengths are computed for each sphere for the reported measurement conditions for a series of cases in which single vibration modes remain unexcited. The computed target strengths are compared with the corresponding experimental values. The working hypothesis is not supported by the data.no_NO
dc.language.isoengno_NO
dc.publisherICESno_NO
dc.relation.ispartofseriesICES CM Documents;1996/B:37
dc.subjectecho sounderno_NO
dc.subjectekkoloddno_NO
dc.subjectgear experimentsno_NO
dc.subjectredskapsforsøkno_NO
dc.titleEffect of missing modes on calibration sphere target strengthsno_NO
dc.typeWorking paperno_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924no_NO
dc.source.pagenumber10 s.no_NO


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