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Halvor Hobæk's picture

Halvor Hobæk

Professor Emeritus
  • E-mailHobak@uib.no
  • Phone+47 55 58 27 87
  • Visitor Address
    Allégaten 55
  • Postal Address
    Postboks 7803
    5020 BERGEN
Academic article
  • Show author(s) (2021). Inversion of surficial sediment thickness from under-ice acoustic transmission measurement. Journal of the Acoustical Society of America. 371-385.
  • Show author(s) (2017). Measured and modeled acoustic propagation underneath the rough Arctic sea-ice. Journal of the Acoustical Society of America. 1619-1633.
  • Show author(s) (2014). Scattering properties of Atlantic mackerel over a wide frequency range. ICES Journal of Marine Science. 1904-1912.
  • Show author(s) (2014). Broad bandwidth acoustic backscattering from sandeel - measurements and finite element simulations. ICES Journal of Marine Science. 1894-1903.
  • Show author(s) (2013). Characterization of target spheres for broad-band calibration of acoustic systems. Acta Acustica united with Acustica. 465-476.
  • Show author(s) (2009). Measurements of acoustic-scattering spectra from the whole and parts of Atlantic mackerel. ICES Journal of Marine Science. 1169-1175.
  • Show author(s) (2009). A seismic field test with a Low-level Acoustic Combustion Source and Pseudo-Noise codes. Journal of Applied Geophysics. 66-73.
  • Show author(s) (2008). Semiperiodic chirp sequences reduce autocorrelation side lobes of pulsed signals. Geophysics. Q19-Q27.
  • Show author(s) (2008). A seismic field test with a low-level acoustic combustion source and pseudo-noise codes. Journal of Applied Geophysics.
  • Show author(s) (2007). Marine seismics with a pulsed combustion source and Pseudo Noise codes. Marine Geophysical Researches. 109-117.
  • Show author(s) (2003). The variation of heating depth with therapeutic ultrasound frequency in physiotherapy. Ultrasound in Medicine and Biology. 113-118.
  • Show author(s) (1997). Experimental and numerical investigation of shock wave propagation in the post focal region of focused sound field. Acta Acustica united with Acustica. 978-986.
  • Show author(s) (1997). Experimental and numerical investigation of shock wave propagation in the post focal region of a focused sound field. Acustica. 978-986.
Report
  • Show author(s) (2017). Interaction of sound and rough ice in the arctic . 380. 380. .
  • Show author(s) (2016). Under-Ice Acoustic Propagation NERSC - WHOI. 97. 97. .
  • Show author(s) (2016). Reflection of sound waves from the underside of the rough ice canophy in the Arctic Ocean. 374. 374. .
  • Show author(s) (2016). On sound reflection from layered ice sheets. 367. 367. .
  • Show author(s) (2015). Sound reflection from layered media. 340. 340. .
  • Show author(s) (2004). Synthesis of experimental simulation of sonic boom SOBER Project Task 2.8 - Technical Report. .
  • Show author(s) (1998). Proceedings of the 21 th Scandinavian Symposium on Physical Acoustics. .
  • Show author(s) (1997). Proceedings of the 20th Scandinavian symposium on physical acoustics. 1997-04. 1997-04. .
  • Show author(s) (1996). Proceedings of the 19th Scandinavian symposium on physical acoustics. 10-1996. 10-1996. .
  • Show author(s) (1992). 15th Scandinavian Cooperation Meeting in Acoustics/Hydrodynamics. Ustaoset Høyfjellshotel 2.-5. February 1992. Compilation of Abstracts. .
Popular scientific lecture
  • Show author(s) (2011). Glimt fra aktuell akustikkforskning.
Academic lecture
  • Show author(s) (2016). Sea ice effect on long-range transmitted and modelled acoustic communication signals .
  • Show author(s) (2016). Geometry of Acoustic Communication Links in the Arctic. In Proceedings of the Institute of Acoustics.
  • Show author(s) (2012). Wide band calibration of echo sounders using spheres.
  • Show author(s) (2011). The frequency response of Atlantic mackerel and sandeel.
  • Show author(s) (2011). On vertical echo sounder bottom echoes.
  • Show author(s) (2011). Experimental investigation of scattering properties of Atlantic mackerel.
  • Show author(s) (2010). On correction of depth dependence for normal incidence echosounders.
  • Show author(s) (2009). Parametric acoustic arrays: A Bergen view.
  • Show author(s) (2009). Parametric acoustic arrays: 50 years.
  • Show author(s) (2009). Development of an acoustical measuring system for assessing the quality of fish meat.
  • Show author(s) (2009). Analysis of echoes from a plane reflector - steps towards acoustic habitat mapping.
  • Show author(s) (2007). SOUND SCATTERING FROM SHORT METALLIC CYLINDERS AND ITS RELATION TO MODAL VIBRATIONS.
  • Show author(s) (2007). Modal analysis of sound scattering from short metallic cylinders.
  • Show author(s) (2006). Superharmonic imaging in ultrasound.
  • Show author(s) (2006). Scattering from spheres and cylinders - revisited.
  • Show author(s) (2006). Scattering from mackerel bones.
  • Show author(s) (2006). Acoustic Scattering from Atlantic Mackerel Backbones.
  • Show author(s) (2005). Measurement of shadow zone, caustic regions and field along the bottom, in a tank experiement with a strong sound speed profile.
  • Show author(s) (2005). Experiment on finite amplitude sound propagation in a fluid with a strong sound speed gradient.
  • Show author(s) (2005). Acoustic monitoring in the Arctic, in particular the Fram Strait.
  • Show author(s) (2005). A model experiment for measuring sound propagation in a medium with a strong sound speed gradient.
  • Show author(s) (2004). Peculiar waveform distortion in stratified media.
  • Show author(s) (2003). Elektriske-/Magnetiske felt. Hva er det?
  • Show author(s) (2003). Asymmetric shock fronts in high intensity ultrasound beams.
  • Show author(s) (2002). Simulations, design and measurements on a 1 MHz air-backed transducer.
  • Show author(s) (2002). Results from Ray Simulations in the Arctic using Numerical Environmental data from a Climate Model.
  • Show author(s) (2002). Raytracing in the Presence of an Ice Cover.
  • Show author(s) (2002). Phase of shock wave harmonics in focused and unfocused ultrasonic beams.
  • Show author(s) (2002). Om å ta seg vann over hodet - hydroakustikk ved Fysisk Institutt, UiB.
  • Show author(s) (2001). Sound ray stability in the Fram Strait.
  • Show author(s) (2001). Single burst acoustic streaming.
  • Show author(s) (2001). Acoustic streaming generated using low burst repetition frequencies and single bursts.
  • Show author(s) (2000). Singel burst acoustic streaming.
  • Show author(s) (2000). Singel burst acoustic streaming.
  • Show author(s) (2000). Acoustic monitoring of ocean climate in the central artic.
  • Show author(s) (2000). Acoustic monitoring of ocean climate in the central artic.
  • Show author(s) (2000). Acoustic monitoring of Ocean Climate in the Artic.
  • Show author(s) (2000). Acoustic monitoring of Ocean Climate in the Artic.
  • Show author(s) (1999). Spheres for calibrating high-frequency broadband echo sounders.
  • Show author(s) (1999). On two peculiar effects observed in high intensity ultrasound beams.
  • Show author(s) (1999). AMOC: Preliminary results.
  • Show author(s) (1998). Reflection and refraction of sound beams at a fluid-fluid interface near critical incidence angle.
  • Show author(s) (1998). On the asymmetnc shape of shock waves in focused sound fields.
Masters thesis
  • Show author(s) (2010). Acostic tomography in the fram strait: - Predicted and measured travel times.
  • Show author(s) (2009). Utvikling av eit industrielt akustisk målesystem for å bestmme kvalitet i fiskekjøt.
  • Show author(s) (2009). Transduser med stabil åpningsvinkel over et stort frekvensområde. Design, kinstruksjon og eksperimentelle målinger.
  • Show author(s) (2009). Investigation of the possibilities for seabottom characterization using echosounder data.
  • Show author(s) (2009). Adaptive transdusere basert på tidsreversering. Målinger på en 5x5 array prototype.
  • Show author(s) (2008). Lokalisering og bestemmelse av objekter i sidescan sonar datasett.
  • Show author(s) (2006). Måling av akustisk spreiing frå makrellbein.
Doctoral dissertation
  • Show author(s) (2018). Acoustic Propagation Underneath the Arctic Sea-ice.
  • Show author(s) (2013). Acoustic Properties - Fish Without Swimbladder.
  • Show author(s) (2009). Multifrequency acoustic target strength of Northern krill.
  • Show author(s) (2008). Marine seismics with a Low-level Acoustic Combustion Source and time-coded sequences.
  • Show author(s) (2007). Methodology for in situ target strength measurement of fish.
  • Show author(s) (1977). Parametric acoustic transmitting arrays.
Museum exhibition
  • Show author(s) (2005). Fysikkhistorisk utstilling, Glassburet, Institutt for fysikk og teknologi, Universitetet i Bergen.

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