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Browsing Bergen Open Research Archive by Author "Lunde, Per"

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    • Finite-Amplitude Power Budget Equations for Acoustic Fish Abundance Estimation 

      Lunde, Per (Journal article; Peer reviewed, 2020)
      Finiteamplitude (nonlinear) sound propagation effects in seawater may cause measurement errors in fish and zooplankton abundance estimation and species identification for accessible echo sounder transmit electrical power ...
    • Finite-amplitude sound propagation effects in volume backscattering measurements for fish abundance estimation 

      Pedersen, Audun Oppedal; Lunde, Per; Tichy, Frank; Korneliussen, Rolf (Journal article; Peer reviewed, 2022)
      Scientific advice for governmental management of marine resources relies on acoustical observation methods. Quantification and identification of fish and plankton species are often achieved using multi-frequency acoustic ...
    • Interaction of three-dimensional acoustic beam with fluid-loaded solid plate: Axial near- to far-field transmission at normal beam incidence 

      Sæther, Mathias Myrtveit; Midtbø, Simen Hammervold; Lunde, Per (Journal article; Peer reviewed, 2022)
      Axial radiation from leaky Lamb waves propagating in a 6.05 mm water-immersed steel plate being excited by a sound beam normally incident to the plate, is investigated as a function of axial distance, z, and frequency, f, ...
    • Power budget equations and calibration factors for fish abundance estimation using scientific echo sounders and sonar systems 

      Lunde, Per; Korneliussen, Rolf (Peer reviewed; Journal article, 2016-07-09)
      Acoustic methods used in fish abundance estimation constitute a key part of the analytic assessment that makes the basis for abundance estimation of marine resources. The methods rely on power-budget equations and calibrated ...

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