Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Per Lunde"'
Publikováno v:
MethodsX, Vol 11, Iss , Pp 102475- (2023)
In measurements and numerical modelling of wave propagation, undesired interference between direct and multipath arrivals can be reduced using Fourier-based signal processing methods. Existing methods, such as cepstral analysis and time-signal gating
Externí odkaz:
https://doaj.org/article/f912d77dadb54535b120c5c9502847e6
Autor:
Per Lunde
Publikováno v:
Journal of Marine Science and Engineering, Vol 8, Iss 2, p 98 (2020)
Finiteamplitude (nonlinear) sound propagation effects in seawater may cause measurement errors in fish and zooplankton abundance estimation and species identification for accessible echo sounder transmit electrical power levels and operating frequenc
Externí odkaz:
https://doaj.org/article/b10ceb943a0548be84746fcc54d4e8d3
Publikováno v:
Norsk Epidemiologi, Vol 2009, Iss 1, Pp 29-36 (2009)
Externí odkaz:
https://doaj.org/article/91199fb66d5f49b8b1b92d9354a431be
Autor:
Per Lunde, Rolf J. Korneliussen
Publikováno v:
Journal of Marine Science and Engineering, Vol 4, Iss 3, p 43 (2016)
Acoustic methods used in fish abundance estimation constitute a key part of the analytic assessment that makes the basis for abundance estimation of marine resources. The methods rely on power-budget equations and calibrated systems. Different formul
Externí odkaz:
https://doaj.org/article/ac6e8d42590a4c39a7dae3978d2b07c9
Autor:
Mathias Myrtveit Sether, Per Lunde
Publikováno v:
2022 IEEE International Ultrasonics Symposium (IUS).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c1f838d701e51099571c295cbbda068
https://doi.org/10.1109/ius54386.2022.9957471
https://doi.org/10.1109/ius54386.2022.9957471
Publikováno v:
The Journal of the Acoustical Society of America. 152:A227-A227
In modelling of ultrasonic measurement systems and calculation of diffraction corrections for such systems, it is often assumed that the spatially averaged free-field pressure over the front surface of a piezoelectric transducer, ⟨ p⟩, can be use
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::184ec5970179f55494718f1f7343195c
https://doi.org/10.1121/10.0016092
https://doi.org/10.1121/10.0016092
Autor:
Per Lunde
Publikováno v:
Journal of Marine Science and Engineering
Journal of Marine Science and Engineering, Vol 8, Iss 2, p 98 (2020)
Volume 8
Issue 2
Journal of Marine Science and Engineering, Vol 8, Iss 2, p 98 (2020)
Volume 8
Issue 2
Finiteamplitude (nonlinear) sound propagation effects in seawater may cause measurement errors in fish and zooplankton abundance estimation and species identification for accessible echo sounder transmit electrical power levels and operating frequenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f687d52472cc5b64c4be4497945e23ef
https://hdl.handle.net/11250/2739643
https://hdl.handle.net/11250/2739643
Publikováno v:
Acta Acustica
– Scientific advice for governmental management of marine resources relies on acoustical observation methods. Quantification and identification of fish and plankton species are often achieved using multi-frequency acoustic data. Accurate measuremen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dda51fb40fe03a7ae77d7c4299edc8d
https://doi.org/10.1051/aacus/2022010
https://doi.org/10.1051/aacus/2022010
Publikováno v:
The Journal of the Acoustical Society of America. 142:825-837
Transit-time flow meters based on guided ultrasonic wave propagation in the pipe spool have several advantages compared to traditional inline ultrasonic flow metering. The extended interrogation field, obtained by continuous leakage from guided waves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04a161ab3bcf8ed6df679d32b197f6c4
https://doi.org/10.1121/1.4996851
https://doi.org/10.1121/1.4996851
Publikováno v:
The Journal of the Acoustical Society of America. 140:EL67-EL72
The characteristics of a sound beam transmitted through a fluid-embedded viscoelastic plate at normal incidence can deviate significantly from those of a plane-wave. Phenomena such as frequency shift, signal amplification or reduction, and changed be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ab35b53b4177fa7353e1e2ea697fbea
https://doi.org/10.1121/1.4954893
https://doi.org/10.1121/1.4954893