Quantification of a multibeam sonar for fisheries assessment applications

N A Cochrane; Y Li; G D Melvin

doi:10.1121/1.1587151

Quantification of a multibeam sonar for fisheries assessment applications

J Acoust Soc Am. 2003 Aug;114(2):745-58. doi: 10.1121/1.1587151.

Authors

N A Cochrane¹, Y Li, G D Melvin

Affiliation

¹ Ocean Sciences Division, Department of Fisheries and Oceans, Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada. cochranen@mar.dfo-mpo.gc.ca

PMID: 12942957
DOI: 10.1121/1.1587151

Abstract

The acoustic theory is developed for a multibeam fisheries-type sonar employing a circular arc of transducer elements. Specifically, numerical relations for transmit and receive beam patterns are derived and methodologies set forth for the derivation of appropriately scaled acoustic target strength and acoustic volume backscattering strength from an ideally performing multibeam device. Predicted and measured beam characteristics of a realizable multibeam sonar, a Kongsberg Simrad-Mesotech SM 2000, are compared. Practical techniques for the extraction of calibrated acoustic volume backscattering strength from real systems are advanced.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Acoustics / instrumentation
Fisheries*
Models, Theoretical*
Ultrasonics*