Browsing by Author "Jenserud, Trond"
Now showing items 1-15 of 15
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Analysis of bottom samples collected from the Norwegian Trench during Rumble Second Sea Trial
Jenserud, Trond; Ottesen, Dag (2004)The RUMBLE second sea trial was carried out in the Norwgian Trench northwest of Stavanger in September –October 2002. 35 grab samples were collected during the experiment. This report presents the results of grain size ... -
Analysis of bottom samples from Vestfjorden collected during Rumble First Sea Trial
Jenserud, Trond; Ottesen, Dag (2002)As a part of the RUMBLE first sea trial 15 sediment samples were taken from two areas in the inner and outer Vestfjorden, respectively. This report presents the results of the analysis of the sediment samples. The seabed ... -
A collection of oceanographic and geoacoustical data in Vestfjorden - obtained from the MILOC survey Rocky Road
Jenserud, Trond (2002)A brief overview of oceanographic and geoacoustic data from the Vestfjorden area is given. The overview is based on data collected during the MILOC survey Rocky Road, which took place during 1992-95. -
Exact 3D scattering solutions for spherical symmetric scatterers
Venås, Jon Vegard; Jenserud, Trond (2018)In this paper, exact solutions to the problem of acoustic scattering by elastic spherical symmetric scatterers are developed. The scatterer may consist of an arbitrary number of fluid and solid layers, and scattering with ... -
Generalization and stabilization of exact scattering solutions for spherical symmetric scatterers
Venås, Jon Vegard; Jenserud, Trond (2022-08-29)In a previous work the authors described a fast high-fidelity computer model for acoustic scattering from multi-layered elastic spheres. This work is now extended with a scaling strategy significantly mitigating the problem ... -
Isogeometric Analysis of Acoustic Scattering using Infinite Elements
Venås, Jon Vegard; Kvamsdal, Trond; Jenserud, Trond (2018)Isogeometric analysis (IGA) has proven to be an improvement on the classical finite element method (FEM) in several fields, including structural mechanics and fluid dynamics. In this paper, the performance of IGA coupled ... -
Measurements and modeling of effects of out-of-plane reverberation on the power delay profile for underwater acoustic channels
Jenserud, Trond; Ivansson, Sven (2015)Long reverberation tails are often observed in shallow-water acoustic channel impulse responses (CIRs). Examples from three significantly different environments along the Norwegian coast are presented. It is shown that 2-D ... -
Rumble final report (DE 19)
Jenserud, Trond; Knudsen, Tor (2004)The main goal of project RUMBLE has been to enhance our capability to predict active sonar detection ranges in shallow water. The idea is to measure ‘through-the-sensor’ the seabed characteristics that affects long-range ... -
Rumble project - scattering index models
Jenserud, Trond; Simons, Dick; Cristol, Xavier (2001)In this note we describe some models for the backscattering strength of a rough seafloor. The models range from the simple Lambert’s rule to perturbation models that include the effect of roughness and volumeinhomogeneities. For ... -
Summary report on analysis of acoustic data from the SWASI-99 array experiment
Eidem, Ellen Johanne; Jenserud, Trond; Søstrand, Knut A.; Tollefsen, Dag (2003)The localization of underwater acoustic sources in a shallow water environment is addressed. Two array signal processing methods suitable for low-frequency signals in shallow water have been applied to data from an ... -
Technical report on assessment of rumble inversion results (DE18)
Chalindar, B.; Jenserud, Trond; Knudsen, Tor; Dombestein, Elin; Plaisant, Alain; Ainslie, Michael; Ellingsen, Ingunn (2004)The main goal of project RUMBLE has been to enhance our capability to predict active sonar detection ranges in shallow water. The idea is to measure ‘through-the-sensor’ the seabed characteristics that affects long-range ... -
Under-ice mid-frequency acoustic transmissionand communication in two Arctic Oceanenvironments
Tollefsen, Dag; Walree, Paul van; Jenserud, Trond; Forsmo, Vidar (2023-02-23)This paper presents data from mid-frequency (4−8 kHz) under-ice acoustic transmission and communication experiments in the Nansen Basin and in the Beaufort Sea of the Arctic Ocean. Measured impulse responses to range ~10 ... -
Validation of replay-based underwater acoustic communication channel simulation
Otnes, Roald Wilhelm; Walree, Paul van; Jenserud, Trond (2013)This paper discusses validation methods for underwater acoustic communication channel simulators, and validates direct and stochastic replay of underwater acoustic communication channels as implemented in a channel simulator ... -
The Watermark benchmark for underwater acoustic modulation schemes
Walree, Paul van; Socheleau, François-Xavier; Otnes, Roald Wilhelm; Jenserud, Trond (2017)Watermark is a freely available benchmark for physical-layer schemes for underwater acoustic communications. It allows researchers to test and compare algorithms for the physical layer under realistic and reproducible ... -
The Watermark manual and user's guide - version 1.0
Walree, Paul van; Otnes, Roald; Jenserud, Trond (2016-11-29)Watermark is a benchmark for physical-layer schemes for underwater acoustic communications. It allows researchers and modem manufacturers to develop, test and compare algorithms for the physical layer under highly realistic ...