Directional properties of an 18-kHz transducer

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