Accession Number : ADA517254


Title :   High Frequency Acoustic Propagation using Level Set Methods


Descriptive Note : Conference paper


Corporate Author : NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI


Personal Author(s) : Doran, Sheri L ; Fredricks, Andrew J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a517254.pdf


Report Date : Jan 2007


Pagination or Media Count : 8


Abstract : This paper describes a new approach to numerical solution of the high frequency approximation to the wave equation. Traditional solutions to the Eikonal equation in high frequency acoustics are obtained via ray tracing. In ray tracing, the numerical grid on which solutions are computed becomes distorted over time as rays diverge from the initial wavefront, reducing the accuracy of the solution. The level set method is a fixed grid method, whereby the user controls the underlying grid, and hence the accuracy, of the solution.


Descriptors :   *APPROXIMATION(MATHEMATICS) , *SET THEORY , *UNDERWATER ACOUSTICS , *SOUND TRANSMISSION , *WAVE EQUATIONS , RAY TRACING , WAVEFRONTS , ACCURACY , GRIDS , SYMPOSIA , HIGH FREQUENCY , ALGORITHMS


Subject Categories : Physical and Dynamic Oceanography
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE