Program of the 27th  Scandinavian Symposium on Physical Acoustics

 

Norlandia Ustaoset Hotell 25 january – 28 january 2004

The symposium is sponsored by

OFFICE OF NAVAL RESEARCH INTERNATIONAL FIELD OFFICE

Sunday 25 January

 

Arrival. Dinner is served from 19.00

 

21.15 Opening in the lecture hall

 

21.30 Meeting of the acoustics/optics group of the Norwegian Physical Society

 

Monday 26 January                                              Morning session

7.30    Breakfast

 

8:15  Martin Ochmann, TFH Berlin

          “Boundary element methods for acoustical radiation and scattering problems.”

 

8:55  Leif Bjørnø, Ultratech

          “Scattering of plane acoustic waves at elastic particles with rough surfaces.”

 

9:20  Ellen-Johanne Eidem, FFI

          “Localization of explosions by matched-field techniques using vertical array data.”

  

9:45   Coffee break

 

10.05 Trond Jenserud, FFI

          “Single hydrophone localization of broadband sources.”

 

10:30 Rune Fardal and Colin Lazauski, FFI

         “Development of a near field hydrophone system for low frequency sources.”

 

10:55 Li Xiukun, NTNU

         ” Beamformer with virtual elements.”    

 

11:20 Magnus W. Haakestad and Helge E. Engan, NTNU

         “Acousto-optic interaction in photonic crystal fibers.”

 

11:45  Break,  Lunch will be served from 13.30

Monday 26 January                                                      Afternoon session

 

16.00  Vegar H. Skildheim, UiT

            “Modelling of ultrasonic transducers using FEMLAB”

 

16:25  Remi A. Kippersund (CMR), Per Lunde(CMR) , and Magne Vestrheim(UiB):

           "Finite element modelling of piezoelectric ultrasonic transducer properties

             in natural gas".

 

16:50  Per Lunde (CMR), Remi A. Kippersund (CMR), and Magne Vestrheim(UiB):

          "Transient diffraction effects of piezoelectric ultrasonic transducers

            using finite element modelling".

 

 

17:15 Coffee break

 

17:35 Natalia Gorska ,Rolf  Korneliussen, and Egil Ona, IMR

"Acoustic backscattering by Atlantic mackerel, a representative for fish without                                                                             swimbladder. Part 1: Theory."

 

18:00 Rolf Korneliussen, Egil Ona, and Natalia Gorska , IMR: "Acoustic backscattering by Atlantic

mackerel, a representative for fish without swimbladder. Part 2: Measurements and speculation."

 

18.25  Break, Dinner at 19.15

 

 

Tuesday 27 January                                                     Morning session

7.30     Breakfast

 

8:30   Bengt Enflo, KTH

          "Nonlinear standing and travelling waves in dissipative and dispersive media"

 

 

8:55  Audun Pedersen (CMR), Per Lunde (CMR), and Magne Vestrheim (UiB)

“Convergence and accuracy of the Bergen Code for investigating nonlinear effects in fisheries  echo sounders.”

 

 

9:20  Bryan Woodward , Loughborough University

         "Use of non-linear acoustics to detect and characterise objects buried in

            sea-bed sediments"

 

 

9:45 Coffee break.

 

10:10 Ådne Voll, UiB

          “Experimental Study of Linear and Non-Linear Sound Propagation in the

Shadow Zone Created by an Inhomogeneous Fluid Mixture with a

Sound Speed Maximum.”

 

10:35 Andrew Peplow, KTH

         “ Sound propagation over cuttings and barriers including effects of an absorbing ground.”

 

11:00 Morten Huseby (FFI), Hans Petter Langtangen, and David E. Reksten

          “A Three-Dimensional model for noise propagation over realistic terrain”

 

11:25 Hefeng Dong, NTNU

          “Modeling of echoes from buried target in the ground.”

 

 

11:50 Break, Lunch will be served from 13.30

 

 

 

Tuesday 28 January                                                  Afternoon session

 

 

 

        

16.00  Egidijus Zukauskas, KUT, Lithuania

          “Air-coupled ultrasonic investigation of aerospace materials.”

 

16:25 Erlend Bjørndal (CMR),  Kjell-Eivind Frøysa (CMR), and Magne Vestrheim (UiB).

          “Methods for ultrasonic liquid density measurements”

 

16:50 Petter Norli (CMR), Per Lunde (CMR) , and Magne Vestrheim (UiB)

“Methods for precision sound velocity measurements in pressure cells for gas characterization.”

 

17:15 Coffee break

 

17:40 Sveinung Skjervheim and Magne Vestrheim, UiB

           “Properties of free flooded piezoeletric sylindrical shell transducers."

 

18:05 Torstein Olsmo Sæbø, FFI

          "Synthetic Aperture Sonar Interferometry".

 

18:30 Break, Dinner at 19.15

 

         

 

 

Wednesday 28 January                                                  Morning session

 

7.30     Breakfast

 

9:00  Sven Ivansson, FOI

         “Anechoic effect of coatings of Alberich type, a theoretical and numerical study.”

 

 

9:25 Kjell-Eivind Frøysa og Per Lunde, CMR:

         "Mass and energy measurement of natural gas using ultrasonic flow meters.

          Recent results"

 

9:50  Ulf Kristiansen

           “Acoustic measurements in two straits”

 

10:15 Coffee break.

 

 

10:40 Atle Ommundsen, FFI

         “ Underwater acoustics in fjords and straits, solving the Helmholtz equation”

 

 

11:05  Gunnar Taraldsen, NTNU

            ”Reflection of spherical waves”

          

 

11:30 Halvor Hobæk, UiB

          “Nonlinear sound Waveform distortion observed in a stratified fluid mixture.”

 

 

 

 

11:55 End of Meeting, Lunch is served from 12:30

 

 

 

Poster session:

 

The posters will be on display all the time of the meeting:

 

 

Jan Anders Marheim, B&K

“Beamforming - Optimizing the Array”

jan.marheim@bksv.no

 

Wu Yingzi, NGU

“Chinese Multibeam Bathymetric Sounder System”

wusara2003@yahoo.com.cn