Acoustic Scattering Processes for Target Discrimination
Technical Report,01 Aug 2015,30 Jun 2019
Washington State University Pullman United States
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The purpose of this investigation was to improve the understanding of the way that sound in water interacts with various types of targets in situations similar to those encountered in underwater acoustics. The emphasis was on situations relevant to the use of sonar systems in shallow water. Laboratory methods were developed and tested for displaying the scattering of sound, including partially-exposed targets. Some of the work concerned bistatic scattering. Much of the research was in the intermediate frequency range where geometrically motivated ray based methods were helpful even when elastic responses were significant. Signal processing methods used included synthetic aperture sonar. Some of the research concerns the scattering by beams of sound including vortex beams and the response to acoustic radiation force of beams and other selective ways of exciting oscillations of objects in water.
- Target Direction, Range and Position Finding