title: Modeling interface roughness scattering in a layered seabed for normal-incident chirp sonar signals.
abstract: Downward looking sonar, such as the chirp sonar, is widely used as a sediment survey tool in shallow water environments. Inversion of geo-acoustic parameters from such sonar data precedes the availability of forward models. An exact numerical model is developed to initiate the simulation of the acoustic field produced by such a sonar in the presence of multiple rough interfaces. The sediment layers are assumed to be fluid layers with non-intercepting rough interfaces.
authors.affiliation: Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, Washington 98105, USA. djtang@apl.washington.edu
authors.forename: Dajun
authors.initials: D
authors.lastname: Tang
authors.forename: Brian T
authors.initials: BT
authors.lastname: Hefner