Direct measurements of equivalent beam angle on hull-mounted transducers

dc.contributor.author	Ona, Egil
dc.contributor.author	Vestnes, Gudmund
dc.date.accessioned	2012-07-03T08:58:21Z
dc.date.available	2012-07-03T08:58:21Z
dc.date.issued	1985
dc.identifier.citation	This report is not to be cited without prior reference to the authors	no_NO
dc.identifier.uri	http://hdl.handle.net/11250/103911
dc.description.abstract	Measurements for checking the equivalent beam angle on a hullmounted transducer have been made on a standard 38-29/25-E SIMRAD transducer on the Norwegian research vessel "ELDJARN". The measurements were made during a controlled trimming of the vessel above a previously centered calibration sphere. Comparisons with laboratory measurements of the transducer and theory suggest an effect of the hull mounting of less than 0.2 dB in the equivalent beam angle.	no_NO
dc.language.iso	eng	no_NO
dc.publisher	ICES	no_NO
dc.relation.ispartofseries	ICES CM Documents;1985/B:43
dc.subject	acoustics	no_NO
dc.subject	akustikk	no_NO
dc.subject	gear experiments	no_NO
dc.subject	redskapsforsøk	no_NO
dc.title	Direct measurements of equivalent beam angle on hull-mounted transducers	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	10 s.	no_NO