- E-mailPer.Lunde@uib.no
- Phone+47 55 58 27 86+47 994 93 901
- Visitor AddressAllégaten 555007 Bergen
- Postal AddressPostboks 78035020 Bergen
Academic article
- (2023). Finite element-based diffraction correction for piezoelectric transducers accounting for diffraction at transmission, propagation, and reception. Journal of the Acoustical Society of America. 2177-2190.
- (2023). A spectrum-of-spectrum filtering method to extract direct and multipath arrivals from simulations and measurements. MethodsX. 102475.
- (2022). Interaction of three-dimensional acoustic beam with fluid-loaded solid plate: Axial near- to far-field transmission at normal beam incidence. Ultrasonics. 13 pages.
- (2022). Finite-amplitude sound propagation effects in volume backscattering measurements for fish abundance estimation. Acta Acustica. 12 pages.
- (2022). Compressional wave phase velocity measurements during hydrate growth in partially and fully water saturated sandstone. Fuel. 9 pages.
- (2020). Finite‐amplitude power budget equations for acoustic fish abundance estimation. Journal of Marine Science and Engineering (JMSE). 1-31.
- (2018). Finite element modeling of ultrasound measurement systems for gas. Comparison with experiments in air. Journal of the Acoustical Society of America. 2613-2625.
- (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.
- (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.
- (2016). Power budget equations and calibration factors for fish abundance estimation using scientific echo sounders and sonar systems. Journal of Marine Science and Engineering (JMSE). 23 pages.
- (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.
- (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.
- (2015). Transducer beam diffraction effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence. Proceedings - IEEE Ultrasonics Symposium. 1-4.
- (2015). Equations describing finite-amplitude effects in acoustic fish abundance estimation. Journal of the Acoustical Society of America. 1949-1949.
- (2013). The Evolving Epidemiology of Valvular Aortic Stenosis. The Tromsø Study. Heart. 396-400.
- (2013). Accuracy of real-time single- and multi-beat 3-D speckle tracking echocardiography in vitro. Ultrasound in Medicine and Biology. 1006-1014.
- (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.
- (2002). "CFD simulation and installation effects for ultrasonic flow meters in pipes with bends". International Journal of Applied Mechanics and Engineering. 33-64.
- (2001). "Resonance frequency spectra with convergence tests for piezoceramic disks using the finite element method". Acta Acustica united with Acustica. 271-285.
- (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.
Lecture
- (2020). Thickness resonances and dispersion properties of leaky Lamb modes in a steel plate.
Popular scientific lecture
- (2020). SFI Smart Ocean - Flexible and cost-effective monitoring for management of a productive and healthy ocean.
- (2020). Acoustics - Sensing the invisible.
- (2011). Acoustics, some perspectives.
- (2009). "Bergen Acoustics – Quo vadis?".
- (2009). "Acoustics in the Bergen region".
- (2004). "Bruk av ultralyd til nye måleprosessar".
Academic lecture
- (2023). “Contributions from the backward- and forward-wave bands to ultrasonic beam transmission for a fluid-embedded steel plate”.
- (2023). Using spectrum-of-spectrum (SoS) filtering to extract direct and multipath arrivals from a frequency domain simulation. Comparison with cepstrum and time-gating methods.
- (2023). Near-field diffraction and reception effects in finite element modeling of ultrasound measurement systems for gas. Comparison to measurements in air.
- (2022). Ultrasonic beam transmission through a water-immersed steel plate in the vicinity of the ZGV angle.
- (2022). Radiation in air from a piezoelectric ceramic disk in radial mode vibration. Contributions from front, side and rear surfaces.
- (2022). Errors using the spatially averaged free-field pressure approximation for description of the receiving properties of piezoelectric transducers.
- (2022). Energy-flux density in real-, imaginary-, and complex-valued branches of Lamb modes in an isotropic plate.
- (2022). "Ultrasonic beam transmission in the backward and forward-wave frequency-wavenumber bands of a fluid-embedded steel plate", Proc. 2022 IEEE International Ultrasonics Symposium, Venice, Italy, 10-13 October 2022, 4 p. .
- (2021). Ultrasonic beam radiation from piston source through water-immersed steel plate using ASM. Pressure-to-pressure transfer function and numerical challenges.
- (2021). Diffraction correction for precision measurements of sound velocity in gas. Is full receiver modelling needed?
- (2021). Complex dispersion properties of lossy and leaky Lamb modes related to Poisson's ratio.
- (2020). Nearfield effects from leaky Lamb modes in a steel plate for normal beam incidence.
- (2020). Complex dispersion properties of Lamb modes vs. Poisson’s ratio.
- (2020). 3D simulation of ultrasonic flowmeters using a hybrid FEM-FVM method.
- (2019). Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory.
- (2019). Elastic wave velocities under methane hydrate growth in Bentheim sandstone.
- (2019). Characterization of ultrasound transmit-receive measurement systems in air. Comparison with prior work on piezoelectric elements in radial mode vibration.
- (2019). Acoustic laboratory measurements of hydrate-bearing Bentheim sandstones.
- (2018). Transmission through an isotropic viscoelastic water-coupled plate using a transmit-receive transducer system.
- (2018). Comparison of angular spectrum models for baffled piston sound field with finite receiver apertures.
- (2017). Vibration of a baffled piezoelectric ceramic circular disk in lower radial modes, with near- and farfield sound radiation.
- (2017). Sound field radiation from a non-uniformly vibrating baffled and circular piezoelectric ceramic disk in radial mode vibration.
- (2017). Finite aperture effects in the backward wave propagation region of a leaky Lamb mode at normal beam incidence.
- (2017). Dispersion properties of Lamb and leaky Lamb modes in elastic and viscoelastic plates.
- (2016). Transducer finite aperture effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence.
- (2016). Sound velocity measurement method for porous sandstone. Measurements, finite element modelling, and diffraction correction.
- (2016). Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements.
- (2015). Equations describing finite-amplitude effects in acoustic fish abundance estimation.
- (2015). A unifying theory explaining different formulations of power budget equations and calibration factors commonly used for fish abundance estimation.
- (2015). "Volume backscattering of finite-amplitude acoustic waves: Power flow, sampled volume, and scattering cross section".
- (2015). "Sound velocity measurement method for porous sandstone. Discussion and prelimirary results”.
- (2015). "Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements".
- (2015). "Characterization of ultrasound transmit-receive measurement systems in air. Comparison of finite element modelling and experimental measurements".
- (2015). "Beam transmission of water-embedded steel plate at normal incidence. Diffraction effects in the S1 to A3 region”.
- (2014). Updated results on finite element modeling of a transmit-receive ultrasound measurement system. Comparison with experiments in air.
- (2013). Ultrasonic beam transmission through a steel plate at oblique incidence: Uniform piston vs. piezoelectric transducer.
- (2013). Reciprocity calibration method for ultrasonic, piezoelectric transducers in air, including finite element simulations.
- (2013). Finite element modelling of ultrasound measurement systems for gas. Comparison with experiments in air.
- (2013). Axial sound field from a non-uniformly vibrating circular sound source mounted in a rigid baffle.
- (2013). "Reciprocity calibration method for ultrasonic piezoelectric transducers in air”.
- (2013). "Interaction of a transducer excited ultrasonic beam with an elastic plate. 3D modeling in comparison with experiments”.
- (2013). "Industrial ultrasound research at UiB/IFT. From gas flow measurement to structural monitoring".
- (2013). "Finite element modeling of ultrasound measurement systems for gas. Use of a full receiver description in comparison with spherical reciprocity”.
- (2013). "Finite element modeling of ultrasound measurement systems for gas. System model compared to measurements”.
- (2012). Sound velocity change owing to the acousto-elastic / plastic effects in steel measured using Acoustic Resonance Technology (ART).
- (2012). Sonar and power budget equations for backscattering of finite amplitude sound waves, with implications in fishery acoustics for abundance estimation of marine resources.
- (2012). "Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer. Finite element - angular spectrum modeling and measurements”.
- (2012). "Normal incidence ultrasonic beam transmission through a water-immersed plate using a piezoelectric source transducer. Finite element modeling, angular spectrum method and measurements".
- (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.
- (2011). Hydrate deposit detection in pipes using ultrasonic guided waves.
- (2011). Finite element analysis of acoustic beam interactions with a plate at normal incidence. Comparison with a 3D angular spectrum method and measurements.
- (2011). Diffraction correction in ultrasonic fields for measurements of sound velocity in gas. Conventional and alternative methods.
- (2010). Handbook of uncertainty calculations, - Fiscal oil metering systems based on ultrasonic duty and master meters.
- (2010). "Ultrasonic piezoceramic transducers for air, - finite element analysis and measurements".
- (2010). "Time domain finite element modeling of SH-mode propagation in elastic plates with deposits".
- (2010). "Measurement of fluid viscosity in pipes using multimode ultrasonic guided wave attenuation".
- (2010). "Finite element analysis and measurement of ultrasonic piezoceramic transducers in air and water".
- (2010). "Challenges of ultrasonic quantum measurement of natural gas".
- (2010). "Challenges and technology trends in fiscal metering of natural gas including measurement of CO2 emission".
- (2009). "Nonlinear sound propagation fisheries research echo" sounders (abstract).
- (2009). "Deposit detection using plate waves".
- (2008). "Ultrasonic signal transmission in plates. Study of a steel plate immersed in water".
- (2008). "Transdusere for SURF avbildning".
- (2008). "Simulation of guided waves in a fluid loaded elastic plate".
- (2008). "Pressure and temperature effects for Ormen Lange ultrasonic gas flow meters, - Results from a follow-up study".
- (2008). "Nonlinear sound propagation fisheries research echo sounders".
- (2008). "Handbook of uncertainty calculations, - Ultrasonic fiscal oil metering stations".
- (2007). Developments in transducer technology and reciprocity in ultrasonic flow meters.
- (2007). "Trykk- og temperatur-effekter for Ormen Lange ultralyd gassmålere".
- (2007). "Reciprocal operation of ultrasonic flow meters: Criteria and applications".
- (2007). "Pressure and temperature effects for Ormen Lange ultrasonic gas flow meters".
- (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".
- (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".
- (2007). "Fiskalmåling av olje med høy vannfraksjon. Sensitivitetsstudie for en turbinmeter-basert målestasjon".
- (2006). "Reciprocity in electroacoustic measurement systems, and reciprocal operation: Principles and applications to ultrasonic flow metering".
- (2006). "Mass and energy measurement of natural gas using ultrasonic flow meters. Results from testing on various North Sea gas field data".
- (2006). "Liquid ultrasonic meters for crude oil measurement".
- (2006). "Developments in transducer technology and reciprocity in ultrasonic flow meters".
- (2006). "Developments in transducer technology and reciprocity in ultrasonic flow meters".
- (2006). "Density and calorific value measurement of natural gas using ultrasonic flow meters. Results from testing on various North Sea gas field data".
- (2006). "A three-way pulse method for a precision sound velocity measurement cell".
- (2005). Consequences of non-linear sound propagation on target strength measurements - preliminary studies.
- (2005). "Reciprocity and its utilization in ultrasonic flow meters".
- (2005). "Quantification of nonlinear sound propagation effects in fisheries research echo sounders".
- (2005). "Nonlinear sound propagation effects in fisheries research echo sounders - Measurements and simulations in fresh water".
- (2005). "Nonlinear effects in fisheries and research echo sounders and sonars".
- (2005). "Nonlinear effects in a 200 kHz sound beam".
- (2005). "Liquid ultrasonic meters for crude oil measurement".
- (2005). "Investigation of precision sound velocity measurements as reference for ultrasonic gas flow meters".
- (2005). "Finite element modeling of sound propagation from a piezoelectric transducer through an elastic layer".
- (2005). "Electrical and acoustical response of of a Pz27 piezoelectric ceramic element in air. Finite element analyses and experimental results".
- (2005). "Density and calorific value measurement in natural gas using ultrasonic flow meters".
- (2004). "Transient diffraction effects in piezoelectric ultrasonic transducers using finite element modelling".
- (2004). "Methods for precision sound velocity measurements in pressure cells for gas characterization".
- (2004). "Mass and energy measurement of natural gas using ultrasonic flow meters. Recent results".
- (2004). "Finite element modelling of piezoelectric ultrasonic transducer properties in natural gas".
- (2004). "Convergence and accuracy of the Bergen Code for investigating nonlinear effects in fishery echo sounders".
- (2003). "Transient diffraction effects in ultrasonic meters for volumetric, mass and energy flow measurement of natural gas".
- (2003). "Transient diffraction effects in ultrasonic flow meters for gas and liquid".
- (2003). "Subsea multipath ultrasonic liquid flow meter".
- (2003). "Signal modelling using the FLOSIM system model in ultrasonic instrumentation for industrial applications".
- (2003). "Handbook of uncertainty calculations. Fiscal orifice gas and turbine oil metering stations".
- (2002). "Mass and energy measurement of gas using ultrasonic flow meters".
- (2002). "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations".
- (2002). "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations".
- (2002). "Endelig element modellering av piezoelektriske transduser vibrasjoner".
- (2001). "Ultrasonic scattering from liquid droplets in wet gas".
- (2001). "CFD simulation and installation effects for ultrasonic flow meters in pipes with bends".
- (2001). "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid".
- (2001). "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid".
- (2000). "Finite element modeling of piezoceramic disks including radiation into a fluid medium".
- (2000). "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering".
- (2000). "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering of natural gas".
- (1999). “Investigation of acoustic properties in wet gas for ultrasonic flowmetering”.
- (1999). “Effects of deposits on the performance of ultrasonic gas transducers”.
- (1999). “Comparison of simulation models for ultrasonic propagation in wet gas”.
- (1999). "Functional enhancements within ultrasonic gas flow measurement".
- (1999). "FE simulations of piezoceramic disks with a front layer of varying thickness".
- (1998). “Piezoelectric disks with a front layer. Comparisons of FEM with experimental data”.
- (1997). "Influence of piezoelectric transducer response on transit time determination using cross-correlation of chirp signals".
- (1997). "FEM analysis of piezoelectric disks - Method and testing".
- (1996). "Operation of multipath ultrasonic gas flow meters in noisy environments".
- (1995). "Radial modes in thick, circular, isotropic and piezoceramic disks".
- (1995). "Modelling of loss effects in piezoceramic materials, and adaptation to measurements on radial and thickness modes in thin disks".
- (1994). "On the modelling of causal wave propagation in viscoelastic solids".
- (1994). "Comparison of models for radial and thickness modes in piezoceramic disks".
- (1993). "On the modelling of wave propagation in piezoelectric ceramic transducers".
- (1992). "Comparison of full-wave and ray-tracing synthetic seismograms with emphasis on thin-layer resolution".
- (1992). "A comparison of full-wave and ray-tracing seismograms with emphasis on thin-layer resolution".
- (1991). "Seismic wave simulation in exploration and production".
- (1991). "Interference effects in sound fields transmitted at fluid-fluid and fluid-solid interfaces".
- (1990). "Aspects of transducer modelling".
- (1989). "Ultrasonic pulse propagation in stratified multiphase media".
- (1989). "The interaction of seismic waves with shallow gas structures".
- (1989). "Pulse generation using a parametric source".
- (1988). "Årsaker til heliumtaleforvrenging".
- (1988). "Signalbehandling i parametriske antenner".
- (1988). "Parametrisk lydkilde. Optimalisering".
- (1988). "Numerical simulation of ultrasonic flowmeters".
- (1988). "High resolution shallow seismic surveying using parametric acoustic source technology".
- (1988). "Full wave simulation of multilayer reflection coefficients in shallow seismics".
- (1987). "Utvikling av akustiske transdusere for gass-strømmåling".
- (1987). "Simuleringsverktøy for ultralyd væske og gasstrømningsmåling".
- (1987). "Simulering av full-bølge lydforplantning i marin seismikk".
- (1987). "Numerical simulation of ultrasonic flowmeters".
- (1987). "Modelling of acoustic transducers".
- (1987). "Full wave elastic modelling for seismic detection of shallow gas".
- (1987). "Full bølgje FFP simulering for seismisk gasslommedeteksjon".
- (1987). "FFP-modelling of seismic / elastic waves in horizontally stratified geologies".
- (1986). "Tredimensjonal FFP modellering av elastiske bølgjer i horisontalt stratifiserte media".
- (1986). "The influence of diving masks on the formant spectrum of normal speech and helium speech".
- (1985). "Acoustic transmission line analysis of formants in hyperbaric helium speech".
- (1984). "Unscrambling of speech in a hyperbaric helium oxygen atmosphere".
- (1984). "Formantanalyse av hyperbar heliumtale".
- (1984). "Det matematiske og fysiske grunnlaget for datamaskinell taleprosessering".
Academic anthology/Conference proceedings
- (2000). "GERG project on ultrasonic gas flow meters, Phase II. GERG Technical Monograph TM11. Groupe Européen de Recherches Gazières". VDI Verlag.
Doctoral dissertation
- (2023). A hybrid numerical method for 3D multiphysics modeling of ultrasonic transit-time flowmeters, including sound propagation in real pipe flows. PhD Thesis.
- (2018). Elastic wave velocities and attenuation under methane hydrate growth in Bentheim sandstone - Measurements and modelling. PhD Thesis.
- (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 .
- (2014). Measurement of non-linear acoustoelastic effect in steel using acoustic resonance (PhD thesis).
- (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).
- (2007). "Sound velocity cell for gas characterization" (PhD thesis).
- (2006). "Effects of nonlinear sound propagation in fisheries research" (PhD thesis).
- (2000). Finite Element Modeling of Ultrasonic Piezoelectric Transducers. Influence of geometry and material parameters on vibration, response functions and radiated field.
- (2000). "Finite element modelling of ultrasonic piezoelectric transducers. Influence of geometry and material parameters on vibration response functions and radiated field" (Dr. Scient. thesis).
- (1987). Analysis and unscrambling of hyperbaric helium speech.
- (1986). "Analysis and unscrambling of hyperbaric helium speech. Part I and II" (Dr. Philos. thesis).
Interview
- (2020). Slik vil de lage et smartere hav.
- (2020). Forskarar i Bergen vil bli først med trådlaust internett under vatn .
Academic chapter/article/Conference paper
- (2022). Finite-amplitude sound propagation effects in fish abundance estimation. 3 pages.
Abstract
- (2011). Accuracy of real-time single and multi beat 3D speckle tracking echocardiography in vitro. European Heart Journal-Cardiovascular Imaging. ii5-ii6.
- (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.
Article in business/trade/industry journal
- (2010). Fiskalmåling av olje og gass; - Utfordringer og muligheter med ultralydteknologi. NFOGM-nytt (Norwegian Society of Oil and Gas Measurement). 4 pages.
More information in national current research information system (CRIStin)