Now showing items 11-20 of 39
Behavior of individual mesopelagic fish in acoustic scattering layers of Norwegian fjords
(Journal article; Peer reviewed, 2008-05-22)
Mesopelagic acoustic scattering layers (SLs) in 2 fjords were studied from a stationary research vessel. Diel vertical movements of SLs were assessed by hull-mounted transducers, while in situ behavior of individuals ...
Towards the acoustic estimation of jellyfish abundance
(Journal article; Peer reviewed, 2005-06-23)
Acoustic target strengths (TSs) of the 2 most common large medusae, Chrysaora hysoscella and Aequorea aequorea, in the northern Benguela (off Namibia) have previously been estimated (at 18, 38 and 120 kHz) from acoustic ...
Acoustic sampling volume
(Journal article; Peer reviewed, 1991)
Knowledge of the acoustic sampling volume is necessary in many quantitative applications of acoustics. In general, the sampling volume is not merely a characteristic of the transmitting and receiving transducers, but also ...
Correcting acoustic measurements of scatterer density for extinction
(Journal article; Peer reviewed, 1990)
Extinction is sometimes a major problem in acoustic surveys of fish stocks, as it often occurs when the fish are concentrated and easiest to survey. The same may be true of certain macrozooplankton, such as krill in swarms. ...
Wide-Band Response of the Parametric Acoustic Array
Averaging of fish target strength functions
(Journal article; Peer reviewed, 1980)
A general model for averaging the acoustic target strength functions of fish is stated in calculable form. It accounts for the influences of the distribution of generally coupled spatial and orientation states of fish, ...
Acoustic resonance determination of the rigidity modulus