Abstract
Quantifying acoustic scattering from rough interfaces is important for reverberation modeling, acoustic sediment characterization, and propagation modeling. Most models of interface scattering on layered surfaces rely on approximations to the Helmholtz/Kirchhoff integral. These models generally make such assumptions as neglecting the local angle for reflection and disregarding multiple scattering between rough layers. In this study, a mixed boundary element/finite element model is used to calculate rough interface scattering from sediment layers including elastic solids. The finite element method, based on the Helmholtz equation, is exact within the limits of the discretization density; reflections are calculated locally and all orders of scattering among layers are included. Using this model, bottom loss and backscattering predictions will be calculated for several cases. These predictions will be compared with more traditional scattering models and finally to a full finite element model of a point source reflection from the same sediment bottom. [Work supported by ONR, Ocean Acoustics.]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
