Masters thesis

• Økland, Håvard Råheim; Lunde, Per; Sæther, Mathias Myrtveit et al. (2023). Finite element modelling, construction and experimental characterization of piezoelectric transducers for gas. Master thesis. (external link)
• Isaksen, Irene Dahl; Lunde, Per; Sæther, Mathias Myrtveit et al. (2023). Normally incident ultrasonic beam transmission through a water-embedded steel plate as a function of ka-number. Master thesis.. (external link)
• Fosse, Espen; Lunde, Per; Sæther, Mathias Myrtveit et al. (2022). Finite element modeling and experimental characterization of piezoelectric ceramic disk in air. Master thesis. (external link)
• Prøytz, Celine; Lunde, Per; Sæther, Mathias Myrtveit et al. (2022). Underwater ultrasonic transducer technology. Construction, characterization and finite-element modelling. Master thesis. (external link)
• Trætteberg, Philip; Lunde, Per; Sæther, Mathias Myrtveit et al. (2022). An analysis on material constants estimation for the low characteristic impedance piezoceramic Pz37HD using measurements and FEM modeling. Master thesis. (external link)
• Finstad, Sverre Kongsro; Lunde, Per; Sæther, Mathias Myrtveit et al. (2021). Characterization and finite element modelling of piezoelectric ceramic discs vibrating in air, for a frequency range including the first two radial modes. Master thesis. (external link)
• Ravndal, Ivar; Lunde, Per; Vestrheim, Magne (2020). Normal incidence ultrasonic beam transmission through steel plates. Measuring and modelling the transmission coefficient. Master thesis. (external link)
• Eileraas, Magnus Hammervold; Lunde, Per; Vestrheim, Magne (2019). Lydhastighetsmålinger med og uten resonanseffekter i en viskoelastisk stålplate i vann. Master thesis. (external link)
• Grindheim, Renate; Lunde, Per; Vestrheim, Magne (2019). Ultrasonic measurement system for gas. Experimental and theoretical characterization using piezoelectric elements at radial mode vibration in air. Master thesis. (external link)
• Midtbø, Simen Hammervold; Lunde, Per; Vestrheim, Magne et al. (2018). Beam diffraction effects in guided-wave transmission of fluid embedded elastic plate. Influence of receiver distance and finite aperture. Master thesis. (external link)
• Hagen, Andreas; Lunde, Per; Vestrheim, Magne (2017). Ultrasonic measurement systems with diffraction correction for gas: Master thesis. (external link)
• Søvik, Andre Adelsten; Lunde, Per; Vestrheim, Magne (2015). Ultrasonic measurement systems for gas. Finite element modelling compared with measurements in air. Master thesis. (external link)
• Andersen, Kenneth Kirkeng; Lunde, Per; Vestrheim, Magne et al. (2015). Reciprocity calibration of ultrasonic piezoelectric disks in air. Master thesis. (external link)
• Mosland, Eivind; Vestrheim, Magne; Lunde, Per et al. (2013). Reciprocity calibration method for ultrasonic piezoelectric transducers in air. (Master thesis). (external link)
• Hauge, Rune; Lunde, Per; Vestrheim, Magne et al. (2013). Finite element modeling of ultrasound measurement systems for gas. Comparison with experiments in air. (Master thesis). (external link)
• Oma, Odd Sverre; Vestrheim, Magne (2009). Bestemmelse av egenskaper til piezoelektriske skiver med lavt diameter/tykkelse forhold. (external link)
• Aanes, Magne; Vestrheim, Magne (2009). Undersøkelser av piezokeramiske skiver. Målinger og endelig element analyser. (external link)
• Knappskog, Vidar; Vestrheim, Magne (2007). Radiellmode Svingninger i Piezoelektriske Ultralydtransdusere for Luft. Målinger og Endelig Element Analyser. (external link)
• Lohne, Kjetil Daae; Vestrheim, Magne; Lunde, Per (2005). "Undersøkelse og utnyttelse av svingemoder i ultralyd tranduserkonstruksjon" (Master thesis). (external link)
• Kocbach, Jan M.; Vestrheim, Magne; Lunde, Per (1997). "Endelig element modellering av piezoelektriske skiver" (Cand. Scient. thesis). (external link)
• Bjørndal, Erlend; Vestrheim, Magne; Lunde, Per (1994). "Utnyttelse av resonansmodi i ultralyd transduserkonstruksjonar" (Cand. Scient. thesis). (external link)

Academic lecture

• Solberg, Marianne; Lunde, Per; Vestrheim, Magne (2022). Energy-flux density in real-, imaginary-, and complex-valued branches of Lamb modes in an isotropic plate. (external link)
• Sæther, Mathias Myrtveit; Lunde, Per; Vestrheim, Magne (2022). Ultrasonic beam transmission through a water-immersed steel plate in the vicinity of the ZGV angle. (external link)
• Mosland, Eivind Nag; Storheim, Espen; Lunde, Per et al. (2021). Diffraction correction for precision measurements of sound velocity in gas. Is full receiver modelling needed?. (external link)
• Sæther, Mathias Myrtveit; Lunde, Per; Vestrheim, Magne (2021). Ultrasonic beam radiation from piston source through water-immersed steel plate using ASM. Pressure-to-pressure transfer function and numerical challenges. (external link)
• Solberg, Marianne; Aanes, Magne; Lunde, Per et al. (2021). Complex dispersion properties of lossy and leaky Lamb modes related to Poisson's ratio. (external link)
• Sæther, Mathias; Midtbø, Simen Hammervold; Lunde, Per et al. (2020). Nearfield effects from leaky Lamb modes in a steel plate for normal beam incidence. (external link)
• Solberg, Marianne; Aanes, Magne; Lunde, Per et al. (2020). Complex dispersion properties of Lamb modes vs. Poisson’s ratio. (external link)
• Grindheim, Renate; Lunde, Per; Vestrheim, Magne (2019). Characterization of ultrasound transmit-receive measurement systems in air. Comparison with prior work on piezoelectric elements in radial mode vibration. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2018). Transmission through an isotropic viscoelastic water-coupled plate using a transmit-receive transducer system. (external link)
• Midtbø, Simen Hammervold; Aanes, Magne; Lunde, Per et al. (2018). Comparison of angular spectrum models for baffled piston sound field with finite receiver apertures. (external link)
• Storheim, Espen; Lunde, Per; Vestrheim, Magne (2017). Sound field radiation from a non-uniformly vibrating baffled and circular piezoelectric ceramic disk in radial mode vibration. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2017). Dispersion properties of Lamb and leaky Lamb modes in elastic and viscoelastic plates. (external link)
• Lohne, Kjetil Daae; Aanes, Magne; Lunde, Per et al. (2017). Finite aperture effects in the backward wave propagation region of a leaky Lamb mode at normal beam incidence. (external link)
• Storheim, Espen; Lunde, Per; Vestrheim, Magne (2017). Vibration of a baffled piezoelectric ceramic circular disk in lower radial modes, with near- and farfield sound radiation. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2016). Transducer finite aperture effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Storheim, Espen et al. (2015). "Beam transmission of water-embedded steel plate at normal incidence. Diffraction effects in the S1 to A3 region”. (external link)
• Søvik, Andre Adelsten; Andersen, Kenneth Kirkeng; Lunde, Per et al. (2015). "Characterization of ultrasound transmit-receive measurement systems in air. Comparison of finite element modelling and experimental measurements". (external link)
• Andersen, Kenneth Kirkeng; Søvik, Andre Adelsten; Lunde, Per et al. (2015). "Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements". (external link)
• Hauge, Rune; Mosland, Eivind; Storheim, Espen et al. (2014). Updated results on finite element modeling of a transmit-receive ultrasound measurement system. Comparison with experiments in air. (external link)
• Mosland, Eivind; Hauge, Rune; Storheim, Espen et al. (2013). "Reciprocity calibration method for ultrasonic piezoelectric transducers in air”. (external link)
• Hauge, Rune; Mosland, Eivind; Storheim, Espen et al. (2013). "Finite element modeling of ultrasound measurement systems for gas. System model compared to measurements”. (external link)
• Storheim, Espen; Hauge, Rune; Mosland, Eivind et al. (2013). "Finite element modeling of ultrasound measurement systems for gas. Use of a full receiver description in comparison with spherical reciprocity”. (external link)
• Aanes, Magne; Lunde, Per; Vestrheim, Magne (2013). "Interaction of a transducer excited ultrasonic beam with an elastic plate. 3D modeling in comparison with experiments”. (external link)
• Lunde, Per; Vestrheim, Magne; Storheim, Espen et al. (2013). "Industrial ultrasound research at UiB/IFT. From gas flow measurement to structural monitoring". (external link)
• Aanes, Magne; Lunde, Per; Vestrheim, Magne (2013). Ultrasonic beam transmission through a steel plate at oblique incidence: Uniform piston vs. piezoelectric transducer. (external link)
• Mosland, Eivind; Hauge, Rune; Storheim, Espen et al. (2013). Reciprocity calibration method for ultrasonic, piezoelectric transducers in air, including finite element simulations. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2012). "Normal incidence ultrasonic beam transmission through a water-immersed plate using a piezoelectric source transducer. Finite element modeling, angular spectrum method and measurements". (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2012). "Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer. Finite element - angular spectrum modeling and measurements”. (external link)
• Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne (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. (external link)
• Storheim, Espen; Lunde, Per; Vestrheim, Magne (2011). Diffraction correction in ultrasonic fields for measurements of sound velocity in gas. Conventional and alternative methods. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2011). Finite element analysis of acoustic beam interactions with a plate at normal incidence. Comparison with a 3D angular spectrum method and measurements. (external link)
• Amundsen, Ørnulf Svan; Aanes, Magne; Kocbach, Jan et al. (2011). 'Generalized Permittivity' and Source Sensitivity of Piezoelectric Ceramic Disks. (external link)
• Aanes, Magne; Kocbach, Jan; Vestrheim, Magne (2010). Modal and direct harmonic solution methods in FE modeling of piezoceramic disks. (external link)
• Storheim, Espen; Aanes, Magne; Vestrheim, Magne et al. (2010). "Ultrasonic piezoceramic transducers for air, - finite element analysis and measurements". (external link)
• Aanes, Magne; Storheim, Espen; Vestrheim, Magne et al. (2010). "Finite element analysis and measurement of ultrasonic piezoceramic transducers in air and water". (external link)
• Pedersen, Audun Oppedal; Lunde, Per; Korneliussen, Rolf et al. (2009). "Nonlinear sound propagation fisheries research echo" sounders (abstract). (external link)
• Aanes, Magne; Vestrheim, Magne (2009). Finite Element Studies of Permittivity Constants in Piezoceramic Disks. (external link)
• Lohne, Kjetil Daae; Vestrheim, Magne; Lunde, Per (2008). "Ultrasonic signal transmission in plates. Study of a steel plate immersed in water". (external link)
• Pedersen, Audun Oppedal; Lunde, Per; Korneliussen, Rolf et al. (2008). "Nonlinear sound propagation fisheries research echo sounders". (external link)
• Smørgrav, Skule; Abrahamsen, Atle k.; Lunde, Per et al. (2007). Developments in transducer technology and reciprocity in ultrasonic flow meters. (external link)
• Lunde, Per; Vestrheim, Magne; Bø, Reidar et al. (2007). "Reciprocal operation of ultrasonic flow meters: Criteria and applications". (external link)
• Lunde, Per; Norli, Petter; Vestrheim, Magne et al. (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". (external link)
• Smørgrav, Skule; Abrahamsen, Atle k.; Lunde, Per et al. (2006). "Developments in transducer technology and reciprocity in ultrasonic flow meters". (external link)
• Smørgrav, Skule; Abrahamsen, Atle k.; Lunde, Per et al. (2006). "Developments in transducer technology and reciprocity in ultrasonic flow meters". (external link)
• Lunde, Per; Vestrheim, Magne; Bø, Reidar (2006). "Reciprocity in electroacoustic measurement systems, and reciprocal operation: Principles and applications to ultrasonic flow metering". (external link)
• Pedersen, Audun Oppedal; Vestrheim, Magne; Lunde, Per (2005). Consequences of non-linear sound propagation on target strength measurements - preliminary studies. (external link)
• Pedersen, Audun Oppedal; Lunde, Per; Vestrheim, Magne (2005). "Nonlinear effects in fisheries and research echo sounders and sonars". (external link)
• Norli, Petter; Lunde, Per; Vestrheim, Magne (2005). "Investigation of precision sound velocity measurements as reference for ultrasonic gas flow meters". (external link)
• Lunde, Per; Kippersund, Remi André; Vestrheim, Magne et al. (2005). "Finite element modeling of sound propagation from a piezoelectric transducer through an elastic layer". (external link)
• Lohne, Kjetil Daae; Vestrheim, Magne; Lunde, Per (2005). "Electrical and acoustical response of of a Pz27 piezoelectric ceramic element in air. Finite element analyses and experimental results". (external link)
• Lunde, Per; Vestrheim, Magne; Bø, Reidar et al. (2005). "Reciprocity and its utilization in ultrasonic flow meters". (external link)
• Pedersen, Audun Oppedal; Vestrheim, Magne; Lunde, Per (2005). "Nonlinear sound propagation effects in fisheries research echo sounders - Measurements and simulations in fresh water". (external link)
• Tichy, Frank; Solli, H.; Klaveness, H. et al. (2005). "Nonlinear effects in a 200 kHz sound beam". (external link)
• Pedersen, Audun Oppedal; Vestrheim, Magne; Lunde, Per (2005). "Quantification of nonlinear sound propagation effects in fisheries research echo sounders". (external link)
• Lunde, Per; Kippersund, Remi andré; Vestrheim, Magne et al. (2004). "Transient diffraction effects in piezoelectric ultrasonic transducers using finite element modelling". (external link)
• Kippersund, Remi andré; Lunde, Per; Vestrheim, Magne (2004). "Finite element modelling of piezoelectric ultrasonic transducer properties in natural gas". (external link)
• Norli, Petter; Lunde, Per; Vestrheim, Magne (2004). "Methods for precision sound velocity measurements in pressure cells for gas characterization". (external link)
• Pedersen, Audun Oppedal; Lunde, Per; Vestrheim, Magne (2004). "Convergence and accuracy of the Bergen Code for investigating nonlinear effects in fishery echo sounders". (external link)
• Lunde, Per; Frøysa, Kjell-Eivind; Kippersund, Remi andré et al. (2003). "Transient diffraction effects in ultrasonic meters for volumetric, mass and energy flow measurement of natural gas". (external link)
• Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne (2003). "Transient diffraction effects in ultrasonic flow meters for gas and liquid". (external link)
• Lunde, Per; Kippersund, Remi andré; Vestrheim, Magne (2003). "Signal modelling using the FLOSIM system model in ultrasonic instrumentation for industrial applications". (external link)
• Vestrheim, Magne; Lunde, Per; Fardal, Rune (2002). "Endelig element modellering av piezoelektriske transduser vibrasjoner". (external link)
• Frøysa, Kjell-Eivind; Lunde, Per; Vestrheim, Magne (2001). "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid". (external link)
• Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne (2000). "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering". (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne (2000). "Finite element modeling of piezoceramic disks including radiation into a fluid medium". (external link)
• Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne (2000). "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering of natural gas". (external link)
• Furset, Hilde; Lunde, Per; Vestrheim, Magne et al. (1999). “Investigation of acoustic properties in wet gas for ultrasonic flowmetering”. (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne (1999). "FE simulations of piezoceramic disks with a front layer of varying thickness". (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne et al. (1998). “Piezoelectric disks with a front layer. Comparisons of FEM with experimental data”. (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne (1997). "FEM analysis of piezoelectric disks - Method and testing". (external link)
• Vestrheim, Magne; Vervik, Steinar (1996). Transit time determination in a measurement system, with effects of transducers. (external link)
• Lunde, Per; Vestrheim, Magne (1995). "Modelling of loss effects in piezoceramic materials, and adaptation to measurements on radial and thickness modes in thin disks". (external link)
• Lunde, Per; Vestrheim, Magne (1994). "Comparison of models for radial and thickness modes in piezoceramic disks". (external link)
• Lunde, Per; Vestrheim, Magne; Bø, Reidar (1990). "Aspects of transducer modelling". (external link)
• Lunde, Per; Vestrheim, Magne; Lygre, Asle (1989). "Ultrasonic pulse propagation in stratified multiphase media". (external link)
• Lunde, Per; Vestrheim, Magne (1989). "The interaction of seismic waves with shallow gas structures". (external link)
• Vestrheim, Magne; Lunde, Per (1989). "Pulse generation using a parametric source". (external link)
• Vestrheim, Magne; Lunde, Per; Meldahl, Paul (1988). "High resolution shallow seismic surveying using parametric acoustic source technology". (external link)
• Vestrheim, Magne; Lunde, Per (1988). "Signalbehandling i parametriske antenner". (external link)
• Lunde, Per; Vestrheim, Magne (1988). "Full wave simulation of multilayer reflection coefficients in shallow seismics". (external link)
• Lygre, Asle; Vestrheim, Magne; Lunde, Per et al. (1988). "Numerical simulation of ultrasonic flowmeters". (external link)
• Vestrheim, Magne; Lunde, Per (1988). "Parametrisk lydkilde. Optimalisering". (external link)
• Vestrheim, Magne; Lunde, Per (1987). "Utvikling av akustiske transdusere for gass-strømmåling". (external link)
• Lunde, Per; Vestrheim, Magne (1987). "Full bølgje FFP simulering for seismisk gasslommedeteksjon". (external link)
• Lunde, Per; Meldahl, Paul; Vestrheim, Magne (1987). "Full wave elastic modelling for seismic detection of shallow gas". (external link)
• Lygre, Asle; Vestrheim, Magne; Lunde, Per et al. (1987). "Numerical simulation of ultrasonic flowmeters". (external link)
• Berge, Viktor; Lygre, Asle; Lunde, Per et al. (1987). "Simuleringsverktøy for ultralyd væske og gasstrømningsmåling". (external link)
• Vestrheim, Magne; Lunde, Per (1987). "Simulering av full-bølge lydforplantning i marin seismikk". (external link)
• Lunde, Per; Vestrheim, Magne (1986). "Tredimensjonal FFP modellering av elastiske bølgjer i horisontalt stratifiserte media". (external link)

Lecture

• Ravndal, Ivar; Lunde, Per; Vestrheim, Magne (2020). Thickness resonances and dispersion properties of leaky Lamb modes in a steel plate. (external link)

Academic article

• Øyerhamn, Rune; Mosland, Eivind Nag; Storheim, Espen et al. (2018). Finite element modeling of ultrasound measurement systems for gas. Comparison with experiments in air. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2017). Beam diffraction effects in the backward wave regions of viscoelastic leaky Lamb modes for plate transmission at normal incidence. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (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. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2016). Beam diffraction effects in sound transmission of a fluid-embedded viscoelastic plate at normal incidence. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2015). Transducer beam diffraction effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence. (external link)
• Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per et al. (2012). Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer. Finite element - angular spectrum modeling and measurements. (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne (2001). "Resonance frequency spectra with convergence tests for piezoceramic disks using the finite element method". (external link)

Doctoral dissertation

• Storheim, Espen; Lunde, Per; Vestrheim, Magne (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. (external link)
• Aanes, Magne; Lunde, Per; Vestrheim, Magne (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). (external link)
• Bjørndal, Erlend; Vestrheim, Magne; Frøysa, Kjell-Eivind (2007). Acoustic measurement of liquid density with applications for mass measurement of oil. (external link)
• Norli, Petter; Vestrheim, Magne; Lunde, Per (2007). "Sound velocity cell for gas characterization" (PhD thesis). (external link)
• Pedersen, Audun; Vestrheim, Magne; Lunde, Per (2006). "Effects of nonlinear sound propagation in fisheries research" (PhD thesis). (external link)
• Kocbach, Jan; Lunde, Per; Vestrheim, Magne (2000). Finite Element Modeling of Ultrasonic Piezoelectric Transducers. Influence of geometry and material parameters on vibration, response functions and radiated field. (external link)
• Lunde, Per; Vestrheim, Magne; Kocbach, Jan Martin (2000). "Finite element modelling of ultrasonic piezoelectric transducers. Influence of geometry and material parameters on vibration response functions and radiated field" (Dr. Scient. thesis). (external link)

Poster

• Storheim, Espen; Lunde, Per; Vestrheim, Magne (2011). Diffraction correction for precision measurements of sound velocity in gas. Use of an alternative method for non-uniform piezoelectric transmitting transducer vibration (Poster). (external link)
• Pedersen, Audun Oppedal; Vestrheim, Magne; Lunde, Per (2005). Ikkelineær lydforplantning ved bruk av ekkolodd i firskeriforvaltning. (external link)
• Norli, Petter; Lunde, Per; Vestrheim, Magne (2005). "Investigation of precision sound velocity measurement methods as reference for ultrasonic gas flow meters". (external link)

Report

• Kocbach, Jan M.; Lunde, Per; Kippersund, Remi andré et al. (2008). "INDSURF project. 3D finite element simulations for a dual frequency band piezocomposite transducer using FEMP". (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne et al. (2007). "INDSURF project. Comparison of finite element (FE) and plane wave (Mason) types of simulations for a dual frequency band piezocomposite transducer". (external link)
• Kocbach, Jan M.; Lunde, Per; Kippersund, Remi andré et al. (2007). "INDSURF project. 3D finite element simulations for a dual frequency band piezocomposite transducer using FEMP". (external link)
• Lunde, Per; Vestrheim, Magne (2007). "Final report for the 2005-06 UoB-CMR "såkorn" project "3D finite element modelling (FEM) of precision non-wetted ultrasonic fiscal flow meters for oil and gas"". (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne et al. (2006). "Finite element modelling of ultrasonic piezoelectric transducers. Extension of FEMP to 3D analysis". (external link)
• Lunde, Per; Kippersund, Remi andré; Heggstad, Stig et al. (2004). "Multipath ultrasonic liquid flow meter. Ultrasonic transducers for prototype light oil flow meter (Phase 2A). Production procedures". (external link)
• Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne et al. (2004). "Ultrasonic technology for improved exploitation of petroleum resources. A Strategic Institute Programme (SIP). Status Report 2003". (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne (2000). "Tables of resonance frequencies for disks of PZT-5A, PZT-5H, Pb(ZrTi)O3 and PbTiO3". (external link)
• Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne (1999). "FEMP - Finite element modeling of piezoelectric structures. Theory and verification for piezoceramic disks". (external link)
• Lunde, Per; Bø, Reidar; Andersen, Morten I. et al. (1999). “GERG project on ultrasonic flow meters. Phase II - Transducer testing. Part 1: Measurement methods. Part 2: KOS transducers. Part 3: Daniel transducers". (external link)
• Lunde, Per; Vestrheim, Magne (1998). “Precision sound velocity cell for natural gas at high pressures. Phase 1 - Feasibility study”. (external link)
• Lunde, Per; Andersen, Morten I.; Vestrheim, Magne (1997). "EUCLID RTP 10.8 - Smart sonar array. Piezoelectric buzzer for a self calibrating hydrophone system. Work specifications - Rev. 1". (external link)
• Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne (1997). "GARUSO - Version 1.0. Uncertainty model for multipath ultrasonic transit time gas flow meters". (external link)
• Lunde, Per; Andersen, Morten I.; Vestrheim, Magne (1997). "EUCLID RTP 10.8 - Smart sonar array. Piezoelectric buzzer for a self calibrating hydrophone system. Work specifications - Rev. 2". (external link)
• Lunde, Per; Frøysa, Kjell-Eivind; Nesse, Øyvind et al. (1996). "Wet gas flow metering. Ultrasonic transit time methods. Basic studies. TOP - Online monitoring of oil and gas processes". (external link)
• Hobæk, Halvor; Vestrheim, Magne (1996). Proceedings of the 19th Scandinavian symposium on physical acoustics. (external link)
• Lunde, P.; Frøysa, K.-E.; Vestrheim, Magne et al. (1996). Wet gas flow metering. Ultrasonic transit time methods. Basic studies. (external link)
• Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne (1995). "FMUSIK - Version 1.0. Uncertainty model for the 6-path FMU 700 ultrasonic gas flow meter". (external link)
• Lunde, Per; Vestrheim, Magne (1995). "Modelling of loss effects in piezoceramic materials, and adaptation to measurements on radial and thickness modes in thin disks" (Expanded version of paper given at 15th International Congress on Acoustics (ICA '95), Trondheim, Norway, 26-30 June, 1995, Newman, M. (ed.), Volume I, pp. 381-384). (external link)
• Lunde, Per; Vestrheim, Magne; Bø, Reidar et al. (1993). "FMU 700 - Fiskal måler ultralyd. Akustiske transdusere". (external link)
• Lygre, Asle; Ingebrigtsen, Hans; Bø, Reidar et al. (1993). "FMU 700 - Fiskal måler ultralyd. Konstruksjonsunderlag". (external link)
• Lunde, Per; Vestrheim, Magne (1992). "FGM 100 fakkelgasssmålar. Verknad av gassparametrar på ultralyd signaltransmisjon". (external link)
• Lunde, Per; Vestrheim, Magne (1991). "Piezoelectric transducer modelling. Thickness mode vibration". (external link)
• Lunde, Per; Vestrheim, Magne (1991). "Piezoelectric transducer modelling. Part 1: Basic equations for poled ferroelectric ceramics". (external link)
• Lunde, Per; Vestrheim, Magne; Bø, Reidar et al. (1991). "Presisjons ultralyd gass-strømningsmåler. Del 2 - Utvikling og konstruksjon. Design av akustiske transdusere i en flerstråle ultralyd gasstrømningsmåler. Arbeidsrapport nr. 2. Vol. I og II". (external link)
• Vestrheim, Magne; Lunde, Per (1990). "Shallow seismics using parametric acoustic sources". (external link)
• Vestrheim, Magne; Bø, Reidar; Lunde, Per et al. (1990). "Aluminium elektrolysecelle. Ultralydmåling av sjikttykkelser. Akustisk transmisjon i flytende kryolitt". (external link)
• Vestrheim, Magne; Bø, Reidar; Lunde, Per et al. (1989). "Aluminium elektrolysecelle. Ultralydmålinger av sjikttykkelser. Forprosjekt". (external link)
• Jakobsen, J.; Palmstrøm, Robert; Lunde, Per et al. (1989). "Permanent multilayer well monitoring. A study of a down-hole instrumentation system for oil and gas production wells". (external link)
• Vestrheim, Magne; Lunde, Per (1989). "Presisjons ultralyd gass-strømningsmåler. Del 2 - Utvikling og konstruksjon. Rammespesifikasjoner for akustiske transdusere i en flerstråle ultralyd gasstrømningsmåler. Teknisk notat nr. 2.1". (external link)
• Vestrheim, Magne; Lunde, Per (1989). "Shallow gas detection with a parametric seismic source. Phase 1: Feasibility study. Part 2: Technological basis for realization". (external link)
• Vestrheim, Magne; Lunde, Per (1989). "Presisjons ultralyd gass-strømningsmåler. Del 2 - Utvikling og konstruksjon. Numeriske simuleringer av akustiske transdusere for en flerstråle ultralyd gasstrømningsmåler. Teknisk notat nr. 2.2". (external link)
• Lunde, Per; Vestrheim, Magne (1988). "Full wave simulation of multilayer reflection coefficients in shallow seismics" (Expanded version of paper given at XI Scandinavian Cooperation Meeting in Acoustics / Hydrodynamics, Ustaoset, January 31 - February 3, 1988). (external link)
• Lygre, Asle; Lunde, Per; Bø, Reidar et al. (1988). "High precision ultrasonic flowmeter. Sensitivity study. Volume II". (external link)
• Vestrheim, Magne; Lunde, Per (1988). "Shallow gas detection with a parametric seismic source. Phase I: Feasibility study. Part 1". (external link)
• Lygre, Asle; Lunde, Per; Bø, Reidar et al. (1988). "High precision ultrasonic flowmeter. Sensitivity study. Volume I". (external link)
• Lunde, Per; Meldahl, Paul; Vestrheim, Magne (1987). "Full wave elastic modelling for seismic detection of shallow gas". (Expanded version of paper given at 49th Meeting and Technical Exhibition for the European Association of Exploration Geophysicists (EAEG'87), Belgrade, Yugoslavia, June 9-12, 1987). (external link)
• Vestrheim, Magne; Lygre, Asle; Bø, Reidar et al. (1986). "High precision ultrasonic gas flowmeters. Feasibility study". (external link)
• Lunde, Per; Vestrheim, Magne (1986). "Simuleringsprogrammet CAPROS Versjon 1.0. Programvaredokumentasjon". (external link)
• Lunde, Per; Vestrheim, Magne (1986). "Simuleringsprogrammet CAPROS Versjon 1.0. Brukarinstruksjon". (external link)
• Lunde, Per; Vestrheim, Magne (1986). "Lydforplantning fra seismisk kildearray. Simuleringsmodellen CAPROS". (external link)

Academic anthology/Conference proceedings

• Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne (2000). "GERG project on ultrasonic gas flow meters, Phase II. GERG Technical Monograph TM11. Groupe Européen de Recherches Gazières". (external link)

See a complete overview of publications in Cristin.