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Acoustic detection and quantification of benthic egg beds of the squid Loligo opalescens in Monterey Bay, California
(Journal article; Peer reviewed, 2006)
The squid Loligo opalescens is a key species in the nearshore pelagic community of California, supporting the most valuable state marine fishery, yet the stock biomass is unknown. In southern Monterey Bay, extensive beds ...
Protocols for calibrating multibeam sonar
Detecting Atlantic herring by parametric sonar
(Journal article; Peer reviewed, 2010-03-17)
The difference-frequency band of the Kongsberg TOPAS PS18 parametric sub-bottom profiling sonar, nominally 1–6 kHz, is being used to observe Atlantic herring. Representative TOPAS echograms of herring layers and schools ...
Calibration sphere for low-frequency parametric sonars
(Journal article; Peer reviewed, 2007)
The problem of calibrating parametric sonar systems at low difference frequencies used in backscattering applications is addressed. A particular parametric sonar is considered: the Simrad TOPAS PS18 Parametric Sub-bottom ...
Maintaining precision calibrations with optimal copper spheres
(Journal article; Peer reviewed, 1983)
Effects of variations in quantities influencing the backscattering cross sections of solid elastic spheres are studied through a particular case. This is that of the 60-mm-diam copper sphere, which is being used worldwide ...
Acoustic sampling volume of a bistatic sonar
Acoustic resonance determination of the rigidity modulus
The fish swimbladder as an acoustic waveguide