2 citations · 3 across the 5 of their papers we have counts for
5 papers
Characterization of ultrasound transmit-receive measurement systems in air: Comparison with prior work on piezoelectric elements in radial mode vibration
Renate Grindheim, Per Lunde, Magne Vestrheim
A system model is used, describing the voltage-to-voltage transfer function for an ultrasonic transmit-receive transducer pair based on simulations using a finite element model for…
Elastic wave velocities under methane hydrate growth in Bentheim sandstones
Mathias M. Sæther, Per Lunde, Stian Almenningen +1
Experimental acoustic laboratory measurement methods for hydrate-bearing poroelastic solid media are biefly reviewed. A measurement example using the Fourier spectrum method is giv…
Transducer finite aperture effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence
Magne Aanes, Kjetil Daae Lohne, Per Lunde +1
The interaction of ultrasonic waves with fluid-embedded viscoelastic plates, pipes, and shells, have been subject to extensive theoretical and experimental studies over several dec…
Sound velocity measurement methods for porous sandstone. Measurements, finite element modelling, and diffraction correction
Mathias Sæther, Per Lunde, Geir Ersland
Acoustic material parameters of gas hydrate bearing porous rocks are important for evaluation of methods to exploit the vast methane gas resources present in the earth's subsurface…
Magnitude and phase reciprocity calibration of ultrasonic piezoelectric disk in air
Kenneth K. Andersen, Per Lunde, Jan Kocbach
A modified conventional three-transducer reciprocity calibration method is used to measure the magnitude and phase responses of the transmitting voltage response and the free-field…