Updates for Bottom Reverberation Codes
2007
Ivakin, Anatoliy N.
The long-term goal of this research is to develop a package of upgraded bottom reverberation codes based on up-to-date understanding of the physics and mechanisms of sound-seabed interaction. The specific scientific objective of this project is to develop a prototype for a package of physics-based bottom reverberation codes which would be self-consistent and practical. It assumes that the codes would be tested by practical use, particularly by including in analysis of existing seabed scattering database. In this project, scattering data obtained at recent sediment acoustics experiments in shallow water (SAX04) and in laboratory conditions (LMA-CNRS, France) have been used successfully for such testing. The self- consistency and practicality assume also that the codes are able to take into account general characteristics of acoustic systems, such as their directivity and frequency bandwidth (for both narrow- and broad-band systems), and use practically measurable environmental inputs. A first version of such package has been developed in this project that can represent a foundation for development of an up-to-date, physics based interface between acoustic response of the system, such as time series of the reverberation signal, and seabed geoacoustic and geotechnical parameters, such as sediment density, sound speed, attenuation, grain size and others.
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