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Vitenskapelig artikkel
  • Vis forfatter(e) 2020. Finite‐amplitude power budget equations for acoustic fish abundance estimation. Journal of Marine Science and Engineering. 1-31.
  • Vis forfatter(e) 2018. Finite element modeling of ultrasound measurement systems for gas. Comparison with experiments in air. Journal of the Acoustical Society of America. 2613-2625.
  • Vis forfatter(e) 2017. Time-of-flight dependency on transducer separation distance in a reflective-path guided-wave ultrasonic flow meter at zero flow conditions. Journal of the Acoustical Society of America. 825-837.
  • Vis forfatter(e) 2017. Beam diffraction effects in the backward wave regions of viscoelastic leaky Lamb modes for plate transmission at normal incidence. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 1558-1572.
  • Vis forfatter(e) 2016. Power budget equations and calibration factors for fish abundance estimation using scientific echo sounders and sonar systems. Journal of Marine Science and Engineering. 23 sider.
  • Vis forfatter(e) 2016. Finite aperture influence on energy concentration, frequency shift, and signal enhancement, for acoustic transmission in the negative group velocity region of the S1 leaky Lamb mode. Proceedings - IEEE Ultrasonics Symposium. 1-4.
  • Vis forfatter(e) 2016. Beam diffraction effects in sound transmission of a fluid-embedded viscoelastic plate at normal incidence. Journal of the Acoustical Society of America. EL67-EL72.
  • Vis forfatter(e) 2015. Transducer beam diffraction effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence. Proceedings - IEEE Ultrasonics Symposium. 1-4.
  • Vis forfatter(e) 2015. Equations describing finite-amplitude effects in acoustic fish abundance estimation. Journal of the Acoustical Society of America. 1949-1949.
  • Vis forfatter(e) 2013. The Evolving Epidemiology of Valvular Aortic Stenosis. The Tromsø Study. Heart. 396-400.
  • Vis forfatter(e) 2013. Accuracy of real-time single- and multi-beat 3-D speckle tracking echocardiography in vitro. Ultrasound in Medicine and Biology. 1006-1014.
  • Vis forfatter(e) 2012. Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer. Finite element - angular spectrum modeling and measurements. IEEE International Ultrasonics Symposium Proceedings. 1972-1977.
  • Vis forfatter(e) 2002. "CFD simulation and installation effects for ultrasonic flow meters in pipes with bends". International Journal of Applied Mechanics and Engineering. 33-64.
  • Vis forfatter(e) 2001. "Resonance frequency spectra with convergence tests for piezoceramic disks using the finite element method". Acta Acustica united with Acustica. 271-285.
  • Vis forfatter(e) 1997. Effects of strong sound velocity gradients on propagation of low frequency impulse sound: Comparison of FFP predictions and experimental data. Journal of the Acoustical Society of America. 1443-1453.
Rapport
  • Vis forfatter(e) 1993. "Separator instrumentation. Preliminary study of ultrasonic interface detection through a separator steel wall. TOP - Online monitoring of oil and gas processes". .
  • Vis forfatter(e) 1983. "Software documentation of the NUTEC experimental unscrambler". .
  • Vis forfatter(e) 1983. "Communication evaluation during a 350 msw operational dive". .
Faglig foredrag
  • Vis forfatter(e) 2020. Thickness resonances and dispersion properties of leaky Lamb modes in a steel plate.
Populærvitenskapelig foredrag
  • Vis forfatter(e) 2020. SFI Smart Ocean - Flexible and cost-effective monitoring for management of a productive and healthy ocean.
  • Vis forfatter(e) 2020. Acoustics - Sensing the invisible.
  • Vis forfatter(e) 2011. Acoustics, some perspectives.
  • Vis forfatter(e) 2009. "Bergen Acoustics – Quo vadis?".
  • Vis forfatter(e) 2009. "Acoustics in the Bergen region".
  • Vis forfatter(e) 2004. "Bruk av ultralyd til nye måleprosessar".
Vitenskapelig foredrag
  • Vis forfatter(e) 2021. Diffraction correction for precision measurements of sound velocity in gas. Is full receiver modelling needed?
  • Vis forfatter(e) 2020. Nearfield effects from leaky Lamb modes in a steel plate for normal beam incidence.
  • Vis forfatter(e) 2020. Complex dispersion properties of Lamb modes vs. Poisson’s ratio.
  • Vis forfatter(e) 2020. 3D simulation of ultrasonic flowmeters using a hybrid FEM-FVM method.
  • Vis forfatter(e) 2019. Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory.
  • Vis forfatter(e) 2019. Elastic wave velocities under methane hydrate growth in Bentheim sandstone.
  • Vis forfatter(e) 2019. Characterization of ultrasound transmit-receive measurement systems in air. Comparison with prior work on piezoelectric elements in radial mode vibration.
  • Vis forfatter(e) 2019. Acoustic laboratory measurements of hydrate-bearing Bentheim sandstones.
  • Vis forfatter(e) 2018. Transmission through an isotropic viscoelastic water-coupled plate using a transmit-receive transducer system.
  • Vis forfatter(e) 2018. Comparison of angular spectrum models for baffled piston sound field with finite receiver apertures.
  • Vis forfatter(e) 2017. Vibration of a baffled piezoelectric ceramic circular disk in lower radial modes, with near- and farfield sound radiation.
  • Vis forfatter(e) 2017. Sound field radiation from a non-uniformly vibrating baffled and circular piezoelectric ceramic disk in radial mode vibration.
  • Vis forfatter(e) 2017. Finite aperture effects in the backward wave propagation region of a leaky Lamb mode at normal beam incidence.
  • Vis forfatter(e) 2017. Dispersion properties of Lamb and leaky Lamb modes in elastic and viscoelastic plates.
  • Vis forfatter(e) 2016. Transducer finite aperture effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence.
  • Vis forfatter(e) 2016. Sound velocity measurement method for porous sandstone. Measurements, finite element modelling, and diffraction correction.
  • Vis forfatter(e) 2016. Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements.
  • Vis forfatter(e) 2015. Equations describing finite-amplitude effects in acoustic fish abundance estimation.
  • Vis forfatter(e) 2015. A unifying theory explaining different formulations of power budget equations and calibration factors commonly used for fish abundance estimation.
  • Vis forfatter(e) 2015. "Volume backscattering of finite-amplitude acoustic waves: Power flow, sampled volume, and scattering cross section".
  • Vis forfatter(e) 2015. "Sound velocity measurement method for porous sandstone. Discussion and prelimirary results”.
  • Vis forfatter(e) 2015. "Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements".
  • Vis forfatter(e) 2015. "Characterization of ultrasound transmit-receive measurement systems in air. Comparison of finite element modelling and experimental measurements".
  • Vis forfatter(e) 2015. "Beam transmission of water-embedded steel plate at normal incidence. Diffraction effects in the S1 to A3 region”.
  • Vis forfatter(e) 2014. Updated results on finite element modeling of a transmit-receive ultrasound measurement system. Comparison with experiments in air.
  • Vis forfatter(e) 2013. Ultrasonic beam transmission through a steel plate at oblique incidence: Uniform piston vs. piezoelectric transducer.
  • Vis forfatter(e) 2013. Reciprocity calibration method for ultrasonic, piezoelectric transducers in air, including finite element simulations.
  • Vis forfatter(e) 2013. Finite element modelling of ultrasound measurement systems for gas. Comparison with experiments in air.
  • Vis forfatter(e) 2013. Axial sound field from a non-uniformly vibrating circular sound source mounted in a rigid baffle.
  • Vis forfatter(e) 2013. "Reciprocity calibration method for ultrasonic piezoelectric transducers in air”.
  • Vis forfatter(e) 2013. "Interaction of a transducer excited ultrasonic beam with an elastic plate. 3D modeling in comparison with experiments”.
  • Vis forfatter(e) 2013. "Industrial ultrasound research at UiB/IFT. From gas flow measurement to structural monitoring".
  • Vis forfatter(e) 2013. "Finite element modeling of ultrasound measurement systems for gas. Use of a full receiver description in comparison with spherical reciprocity”.
  • Vis forfatter(e) 2013. "Finite element modeling of ultrasound measurement systems for gas. System model compared to measurements”.
  • Vis forfatter(e) 2012. Sound velocity change owing to the acousto-elastic / plastic effects in steel measured using Acoustic Resonance Technology (ART).
  • Vis forfatter(e) 2012. Sonar and power budget equations for backscattering of finite amplitude sound waves, with implications in fishery acoustics for abundance estimation of marine resources.
  • Vis forfatter(e) 2012. "Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer. Finite element - angular spectrum modeling and measurements”.
  • Vis forfatter(e) 2012. "Normal incidence ultrasonic beam transmission through a water-immersed plate using a piezoelectric source transducer. Finite element modeling, angular spectrum method and measurements".
  • Vis forfatter(e) 2011. Ultrasonic beam interactions with a fluid-immersed steel plate at normal and oblique incidence. Measurement results and comparisons with an angular spectrum method in frequency and time-domains.
  • Vis forfatter(e) 2011. Hydrate deposit detection in pipes using ultrasonic guided waves.
  • Vis forfatter(e) 2011. Finite element analysis of acoustic beam interactions with a plate at normal incidence. Comparison with a 3D angular spectrum method and measurements.
  • Vis forfatter(e) 2011. Diffraction correction in ultrasonic fields for measurements of sound velocity in gas. Conventional and alternative methods.
  • Vis forfatter(e) 2010. Handbook of uncertainty calculations, - Fiscal oil metering systems based on ultrasonic duty and master meters.
  • Vis forfatter(e) 2010. "Ultrasonic piezoceramic transducers for air, - finite element analysis and measurements".
  • Vis forfatter(e) 2010. "Time domain finite element modeling of SH-mode propagation in elastic plates with deposits".
  • Vis forfatter(e) 2010. "Measurement of fluid viscosity in pipes using multimode ultrasonic guided wave attenuation".
  • Vis forfatter(e) 2010. "Finite element analysis and measurement of ultrasonic piezoceramic transducers in air and water".
  • Vis forfatter(e) 2010. "Challenges of ultrasonic quantum measurement of natural gas".
  • Vis forfatter(e) 2010. "Challenges and technology trends in fiscal metering of natural gas including measurement of CO2 emission".
  • Vis forfatter(e) 2009. "Nonlinear sound propagation fisheries research echo" sounders (abstract).
  • Vis forfatter(e) 2009. "Deposit detection using plate waves".
  • Vis forfatter(e) 2008. "Ultrasonic signal transmission in plates. Study of a steel plate immersed in water".
  • Vis forfatter(e) 2008. "Transdusere for SURF avbildning".
  • Vis forfatter(e) 2008. "Simulation of guided waves in a fluid loaded elastic plate".
  • Vis forfatter(e) 2008. "Pressure and temperature effects for Ormen Lange ultrasonic gas flow meters, - Results from a follow-up study".
  • Vis forfatter(e) 2008. "Nonlinear sound propagation fisheries research echo sounders".
  • Vis forfatter(e) 2008. "Handbook of uncertainty calculations, - Ultrasonic fiscal oil metering stations".
  • Vis forfatter(e) 2007. Developments in transducer technology and reciprocity in ultrasonic flow meters.
  • Vis forfatter(e) 2007. "Trykk- og temperatur-effekter for Ormen Lange ultralyd gassmålere".
  • Vis forfatter(e) 2007. "Reciprocal operation of ultrasonic flow meters: Criteria and applications".
  • Vis forfatter(e) 2007. "Pressure and temperature effects for Ormen Lange ultrasonic gas flow meters".
  • Vis forfatter(e) 2007. "Precision sound velocity cell as reference for gas quality measurement in ultrasonic flow meters. Preliminary results using two candidate methods with argon at low pressure".
  • Vis forfatter(e) 2007. "Natural gas quality measurement using ultrasonic flow meters. Development of a prototype Gas Analyzer with results from testing on North Sea gas field data".
  • Vis forfatter(e) 2007. "Fiskalmåling av olje med høy vannfraksjon. Sensitivitetsstudie for en turbinmeter-basert målestasjon".
  • Vis forfatter(e) 2006. "Reciprocity in electroacoustic measurement systems, and reciprocal operation: Principles and applications to ultrasonic flow metering".
  • Vis forfatter(e) 2006. "Mass and energy measurement of natural gas using ultrasonic flow meters. Results from testing on various North Sea gas field data".
  • Vis forfatter(e) 2006. "Liquid ultrasonic meters for crude oil measurement".
  • Vis forfatter(e) 2006. "Developments in transducer technology and reciprocity in ultrasonic flow meters".
  • Vis forfatter(e) 2006. "Developments in transducer technology and reciprocity in ultrasonic flow meters".
  • Vis forfatter(e) 2006. "Density and calorific value measurement of natural gas using ultrasonic flow meters. Results from testing on various North Sea gas field data".
  • Vis forfatter(e) 2006. "A three-way pulse method for a precision sound velocity measurement cell".
  • Vis forfatter(e) 2005. "Reciprocity and its utilization in ultrasonic flow meters".
  • Vis forfatter(e) 2005. "Quantification of nonlinear sound propagation effects in fisheries research echo sounders".
  • Vis forfatter(e) 2005. "Nonlinear sound propagation effects in fisheries research echo sounders - Measurements and simulations in fresh water".
  • Vis forfatter(e) 2005. "Nonlinear effects in fisheries and research echo sounders and sonars".
  • Vis forfatter(e) 2005. "Nonlinear effects in a 200 kHz sound beam".
  • Vis forfatter(e) 2005. "Liquid ultrasonic meters for crude oil measurement".
  • Vis forfatter(e) 2005. "Investigation of precision sound velocity measurements as reference for ultrasonic gas flow meters".
  • Vis forfatter(e) 2005. "Finite element modeling of sound propagation from a piezoelectric transducer through an elastic layer".
  • Vis forfatter(e) 2005. "Electrical and acoustical response of of a Pz27 piezoelectric ceramic element in air. Finite element analyses and experimental results".
  • Vis forfatter(e) 2005. "Density and calorific value measurement in natural gas using ultrasonic flow meters".
  • Vis forfatter(e) 2004. "Transient diffraction effects in piezoelectric ultrasonic transducers using finite element modelling".
  • Vis forfatter(e) 2004. "Methods for precision sound velocity measurements in pressure cells for gas characterization".
  • Vis forfatter(e) 2004. "Mass and energy measurement of natural gas using ultrasonic flow meters. Recent results".
  • Vis forfatter(e) 2004. "Finite element modelling of piezoelectric ultrasonic transducer properties in natural gas".
  • Vis forfatter(e) 2004. "Convergence and accuracy of the Bergen Code for investigating nonlinear effects in fishery echo sounders".
  • Vis forfatter(e) 2003. "Transient diffraction effects in ultrasonic meters for volumetric, mass and energy flow measurement of natural gas".
  • Vis forfatter(e) 2003. "Transient diffraction effects in ultrasonic flow meters for gas and liquid".
  • Vis forfatter(e) 2003. "Subsea multipath ultrasonic liquid flow meter".
  • Vis forfatter(e) 2003. "Signal modelling using the FLOSIM system model in ultrasonic instrumentation for industrial applications".
  • Vis forfatter(e) 2003. "Handbook of uncertainty calculations. Fiscal orifice gas and turbine oil metering stations".
  • Vis forfatter(e) 2002. "Mass and energy measurement of gas using ultrasonic flow meters".
  • Vis forfatter(e) 2002. "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations".
  • Vis forfatter(e) 2002. "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations".
  • Vis forfatter(e) 2002. "Endelig element modellering av piezoelektriske transduser vibrasjoner".
  • Vis forfatter(e) 2001. "Ultrasonic scattering from liquid droplets in wet gas".
  • Vis forfatter(e) 2001. "CFD simulation and installation effects for ultrasonic flow meters in pipes with bends".
  • Vis forfatter(e) 2001. "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid".
  • Vis forfatter(e) 2001. "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid".
  • Vis forfatter(e) 2000. "Finite element modeling of piezoceramic disks including radiation into a fluid medium".
  • Vis forfatter(e) 2000. "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering".
  • Vis forfatter(e) 2000. "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering of natural gas".
  • Vis forfatter(e) 1999. “Investigation of acoustic properties in wet gas for ultrasonic flowmetering”.
  • Vis forfatter(e) 1999. “Effects of deposits on the performance of ultrasonic gas transducers”.
  • Vis forfatter(e) 1999. “Comparison of simulation models for ultrasonic propagation in wet gas”.
  • Vis forfatter(e) 1999. "Functional enhancements within ultrasonic gas flow measurement".
  • Vis forfatter(e) 1999. "FE simulations of piezoceramic disks with a front layer of varying thickness".
  • Vis forfatter(e) 1998. “Piezoelectric disks with a front layer. Comparisons of FEM with experimental data”.
  • Vis forfatter(e) 1997. "Influence of piezoelectric transducer response on transit time determination using cross-correlation of chirp signals".
  • Vis forfatter(e) 1997. "FEM analysis of piezoelectric disks - Method and testing".
  • Vis forfatter(e) 1996. "Operation of multipath ultrasonic gas flow meters in noisy environments".
  • Vis forfatter(e) 1995. "Radial modes in thick, circular, isotropic and piezoceramic disks".
  • Vis forfatter(e) 1995. "Modelling of loss effects in piezoceramic materials, and adaptation to measurements on radial and thickness modes in thin disks".
  • Vis forfatter(e) 1994. "On the modelling of causal wave propagation in viscoelastic solids".
  • Vis forfatter(e) 1994. "Comparison of models for radial and thickness modes in piezoceramic disks".
  • Vis forfatter(e) 1993. "On the modelling of wave propagation in piezoelectric ceramic transducers".
  • Vis forfatter(e) 1992. "Comparison of full-wave and ray-tracing synthetic seismograms with emphasis on thin-layer resolution".
  • Vis forfatter(e) 1992. "A comparison of full-wave and ray-tracing seismograms with emphasis on thin-layer resolution".
  • Vis forfatter(e) 1991. "Seismic wave simulation in exploration and production".
  • Vis forfatter(e) 1991. "Interference effects in sound fields transmitted at fluid-fluid and fluid-solid interfaces".
  • Vis forfatter(e) 1990. "Aspects of transducer modelling".
  • Vis forfatter(e) 1989. "Ultrasonic pulse propagation in stratified multiphase media".
  • Vis forfatter(e) 1989. "The interaction of seismic waves with shallow gas structures".
  • Vis forfatter(e) 1989. "Pulse generation using a parametric source".
  • Vis forfatter(e) 1988. "Årsaker til heliumtaleforvrenging".
  • Vis forfatter(e) 1988. "Signalbehandling i parametriske antenner".
  • Vis forfatter(e) 1988. "Parametrisk lydkilde. Optimalisering".
  • Vis forfatter(e) 1988. "Numerical simulation of ultrasonic flowmeters".
  • Vis forfatter(e) 1988. "High resolution shallow seismic surveying using parametric acoustic source technology".
  • Vis forfatter(e) 1988. "Full wave simulation of multilayer reflection coefficients in shallow seismics".
  • Vis forfatter(e) 1987. "Utvikling av akustiske transdusere for gass-strømmåling".
  • Vis forfatter(e) 1987. "Simuleringsverktøy for ultralyd væske og gasstrømningsmåling".
  • Vis forfatter(e) 1987. "Simulering av full-bølge lydforplantning i marin seismikk".
  • Vis forfatter(e) 1987. "Numerical simulation of ultrasonic flowmeters".
  • Vis forfatter(e) 1987. "Modelling of acoustic transducers".
  • Vis forfatter(e) 1987. "Full wave elastic modelling for seismic detection of shallow gas".
  • Vis forfatter(e) 1987. "Full bølgje FFP simulering for seismisk gasslommedeteksjon".
  • Vis forfatter(e) 1987. "FFP-modelling of seismic / elastic waves in horizontally stratified geologies".
  • Vis forfatter(e) 1986. "Tredimensjonal FFP modellering av elastiske bølgjer i horisontalt stratifiserte media".
  • Vis forfatter(e) 1986. "The influence of diving masks on the formant spectrum of normal speech and helium speech".
  • Vis forfatter(e) 1985. "Acoustic transmission line analysis of formants in hyperbaric helium speech".
  • Vis forfatter(e) 1984. "Unscrambling of speech in a hyperbaric helium oxygen atmosphere".
  • Vis forfatter(e) 1984. "Formantanalyse av hyperbar heliumtale".
  • Vis forfatter(e) 1984. "Det matematiske og fysiske grunnlaget for datamaskinell taleprosessering".
Annet produkt
  • Vis forfatter(e) 2020. "Sensor apparatus and method for measuring flow”, US patent No. US 10,557,731 B2; filed 2014-12-29, granted 2020.02.11; 48 p.
  • Vis forfatter(e) 2020. "Sensor apparatus and method for measuring flow", US Patent Application No. US 2020/0132527 A1; filed Dec. 24, 2019; publ. date April 30, 2020; 47 p.
  • Vis forfatter(e) 2019. "Sensor apparatus”, US patent No. US 10,317,262 B2; filed Dec. 29, 2014, granted 2019.06.11. 35 p.
  • Vis forfatter(e) 2012. "Stømningsmåleapparat", Norwegian Patent No. 331687, filed 2009.12.22, public available 2011.06.24, granted 2012.02.20. 43 p. .
  • Vis forfatter(e) 2012. "Flow measuring apparatus. Ultrasonic flow measurement based on propagating time of Lamb waves", UK patent GB2479115, filed 2009.12.22, granted 2012.03.07. .
  • Vis forfatter(e) 2012. "Flow measuring apparatus", US patent No. US 8,141,434 B2, filed 2010.05.07, granted 2012.03.27. 21 p.
Vitenskapelig antologi/Konferanseserie
  • Vis forfatter(e) 2000. "GERG project on ultrasonic gas flow meters, Phase II. GERG Technical Monograph TM11. Groupe Européen de Recherches Gazières". VDI Verlag.
Vitenskapelig monografi
  • Vis forfatter(e) 2001. "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations". Handbook prepared on behalf of the Norwegian Society of Oil and Gas Measurement (NFOGM) and the Norwegian Petroleum Directorate (NPD).
Fagbok
  • Vis forfatter(e) 2003. "Handbook of uncertainty calculations. Fiscal orifice gas and turbine oil metering stations" Handbook prepared on behalf of the Norwegian Society for Oil and Gas Measurement (NFOGM), Norwegian Petroleum Directorate (NPD) & Norwegian Society of Chartered Engineers (NIF)(May 2003). Norwegian Society for Oil and Gas Measurement .
Doktorgradsavhandling
  • Vis forfatter(e) 2018. Elastic wave velocities and attenuation under methane hydrate growth in Bentheim sandstone - Measurements and modelling.
  • Vis forfatter(e) 2015. Diffraction effects in the ultrasonic field of transmitting and receiving circular piezoceramic disks in radial mode vibration. FE modelling and comparison with measurements in air .
  • Vis forfatter(e) 2014. Measurement of non-linear acoustoelastic effect in steel using acoustic resonance (PhD thesis).
  • Vis forfatter(e) 2014. Interaction of piezoelectric transducer excited ultrasonic pulsed beams with a fluid-embedded viscoelastic plate. Finite element modeling, angular spectrum modeling and measurements (PhD thesis).
  • Vis forfatter(e) 2007. "Sound velocity cell for gas characterization" (PhD thesis).
  • Vis forfatter(e) 2006. "Effects of nonlinear sound propagation in fisheries research" (PhD thesis).
  • Vis forfatter(e) 2000. Finite Element Modeling of Ultrasonic Piezoelectric Transducers. Influence of geometry and material parameters on vibration, response functions and radiated field.
  • Vis forfatter(e) 2000. "Finite element modelling of ultrasonic piezoelectric transducers. Influence of geometry and material parameters on vibration response functions and radiated field" (Dr. Scient. thesis).
  • Vis forfatter(e) 1987. Analysis and unscrambling of hyperbaric helium speech.
  • Vis forfatter(e) 1986. "Analysis and unscrambling of hyperbaric helium speech. Part I and II" (Dr. Philos. thesis).
Intervju
  • Vis forfatter(e) 2020. Slik vil de lage et smartere hav.
  • Vis forfatter(e) 2020. Forskarar i Bergen vil bli først med trådlaust internett under vatn .
Sammendrag/abstract
  • Vis forfatter(e) 2011. Accuracy of real-time single and multi beat 3D speckle tracking echocardiography in vitro. European Heart Journal-Cardiovascular Imaging. ii5-ii6.
  • Vis forfatter(e) 2010. Prognostic significance of mitral flow derived Doppler indices in a general population with normal systolic function: A prospective population-based chort study. The Tromso Study 1994-2009. European Heart Journal. 457-457.
Poster
  • Vis forfatter(e) 2013. Measuring stress-state of gas pipelines (Poster presentation).
  • Vis forfatter(e) 2011. Diffraction correction for precision measurements of sound velocity in gas. Use of an alternative method for non-uniform piezoelectric transmitting transducer vibration (Poster).
  • Vis forfatter(e) 2005. Ikkelineær lydforplantning ved bruk av ekkolodd i firskeriforvaltning.
  • Vis forfatter(e) 2005. Consequences of non-linear sound propagation on target strength measurements - preliminary studies.
  • Vis forfatter(e) 2005. "Making downhole sensors available at high temperatures".
  • Vis forfatter(e) 2005. "Investigation of precision sound velocity measurement methods as reference for ultrasonic gas flow meters".
  • Vis forfatter(e) 2005. "Integration methods in ultrasonic flow meters for gas and liquid".
Fagartikkel
  • Vis forfatter(e) 2010. Fiskalmåling av olje og gass; - Utfordringer og muligheter med ultralydteknologi. NFOGM-nytt (Norwegian Society of Oil and Gas Measurement). 4 sider.

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