Browsing Publikasjoner fra CRIStin by Journals "Journal of the Acoustical Society of America"
Now showing items 1-4 of 4
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Estimating target strength and physical characteristics of gas-bearing mesopelagic fish from wideband in situ echoes using a viscous-elastic scattering model
(Peer reviewed; Journal article, 2021)Wideband (38 and 50–260 kHz) target strength of organisms were measured in situ using a towed platform in mesopelagic (200–1000 m depth) layers. Organisms with a gas-inclusion are strong scatterers of sound and acoustically ... -
Estimating the spatial distribution of vocalizing animals from ambient sound spectra using widely spaced recorder arrays and inverse modelling
(Journal article; Peer reviewed, 2019)The sound energy from marine mammal populations vocalizing over extended periods of time adds up to quasi-continuous “choruses,” which create characteristic peaks in marine sound spectra. An approach to estimate animal ... -
Mesopelagic fish gas bladder elongation, as estimated from wideband acoustic backscattering measurements
(Peer reviewed; Journal article, 2022)Backscattered acoustic energy from a target varies with frequency and carries information about its material properties, size, shape, and orientation. Gas-bearing organisms are strong reflectors of acoustic energy at the ... -
Nonlinear crosstalk in broadband multi-channel echosounders
(Peer reviewed; Journal article, 2021)Distortion of acoustic wave caused by nonlinear propagation transfers acoustic energy into higher harmonics of the transmitted signal. When operating several broadband echosounders with non-overlapping frequency bands to ...