Accession Number : ADA262987


Title :   Ocean Acoustic Propagation Predictions from Averaged Sound Speeds Compared to Individual Sound Speeds


Descriptive Note : Conference paper


Corporate Author : NAVAL RESEARCH LAB STENNIS SPACE CENTER MS CENTER FOR ENVIRONMENTAL ACOUSTICS


Personal Author(s) : Oba, Roger M ; Zingarelli, Robert A ; Chin-Bing, Stanley A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262987.pdf


Report Date : Jan 1993


Pagination or Media Count : 5


Abstract : Wave propagation through randomness models much ocean acoustic behavior. Random sound speed introduces non-linearity in the differential equations for the ensemble averages. This leads to results which can be significantly different than if an averaged volume parameters, such as sound speed, are used in a deterministic equation. We examine some theoretical aspects of randomness in the normal mode and parabolic equations. As an example, transmission losses in several specific examples are computed where differences result.


Descriptors :   *ACOUSTIC WAVES , *WAVE PROPAGATION , *WAVE EQUATIONS , *OCEAN MODELS , VELOCITY , PROPAGATION , SOUND , DIFFERENTIAL EQUATIONS , LOSSES , ELASTIC WAVES , OCEANS , BEHAVIOR , ACOUSTICS , SEISMIC WAVES , LINEARITY , REPRINTS , PARAMETERS


Subject Categories : Physical and Dynamic Oceanography
      Numerical Mathematics
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE