dc.contributor.author | Foote, Kenneth G. | |
dc.date.accessioned | 2012-09-06T06:27:04Z | |
dc.date.available | 2012-09-06T06:27:04Z | |
dc.date.issued | 1993 | |
dc.identifier.citation | This report is not to be cited without prior reference to the author | no_NO |
dc.identifier.uri | http://hdl.handle.net/11250/105137 | |
dc.description.abstract | Several theoretical measures of directivity are given for an 18-kHz
transducer that is used in both single-beam and split-beam applications,
namely the SIMRAD transducer type 18-11 in the single-beam variant. These
are based on an idealized representation of the transducer as a planar
array of amplitude-weighted circular elements, with nominal specified
parameters. The computed measures of directivity include the average
beamwidth at -3 dB level, directivity index, and volume reverberation
index, together with related measure of equivalent beam angle. | no_NO |
dc.language.iso | eng | no_NO |
dc.publisher | ICES | no_NO |
dc.relation.ispartofseries | ICES CM Documents;1993/B:29 | |
dc.subject | echo sounder | no_NO |
dc.subject | ekkolodd | no_NO |
dc.subject | gear experiments | no_NO |
dc.subject | redskapsforsøk | no_NO |
dc.title | Directional properties of an 18-kHz transducer | no_NO |
dc.type | Working paper | no_NO |
dc.subject.nsi | VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 | no_NO |
dc.source.pagenumber | 5 s. | no_NO |