This book is a research monograph on high-Frequency Seafloor Acoustics. It is the first book in a new series sponsored by the Office of Naval Research on the latest research in underwater acoustics.

The efficacy of sound to penetrate the seas made acoustic systems in the past century the leading tools for sensing objects in and measuring properties of the seas. For over sixty years The United States Office of Naval Research (ONR) has been a major sponsor of undersea research and development at universities, national laboratories, and industrial organizations. App- priately ONR is the sponsor of this monograph series. The intent of the series is to summarize recent accomplishments in, and to outline perspectives for, underwater acoustics in specific fields of research. The general field has escalated in importance and spread broadly with ri- ness and depth of understanding. It has also, quite naturally, become more specialized. The goal of this series is to present monographs that critically review both past and recent accomplishments in order to address the sho- comings in present understanding. In this way, these works will bridge the gaps in understanding among the specialists and favorably color the direction of new research and development. Each monograph is intended to be a stand-alone advanced contribution to the field. We trust that the reader will also find that each is a critical introduction to related specialized topics of interest as well.

First book in a new series sponsored by the Office of Naval Research on the latest research in underwater acoustics Provides ready access to data and models in high-frequency seafloor acoustics Concise presentation of data and models will be of interest to sonar engineers and researchers working in underwater acoustics Main text provides ready access to data and models and is backed up by an extensive bibliography and technical appendices

Autorentext
Michael Richardson, Tantralehrer, praktiziert seit 1982 Tai Chi und Shiatsu. Seine langjährige Erfahrung mit Meditation und Bewegung hat die Grundlage für ein Eintauchen in die tantrische Dimension geschaffen. www.love4couples.com

Klappentext

High-Frequency Seafloor Acoustics is the first book in a new series sponsored
by the Office of Naval Research on the latest research in underwater acoustics.
This exciting new title provides ready access to experimental data, theory, and
models relevant to high-frequency seafloor acoustics and will be of interest to
sonar engineers and researchers working in underwater acoustics. The physical
characteristics of the seafloor affecting acoustic propagation and scattering are
covered, including physical and geoacoustic properties and surface roughness.
Current theories for acoustic propagation in sediments are presented along
with corresponding models for reflection, scattering, and seafloor penetration.
The main text is backed up by an extensive bibliography and technical appendices.

Inhalt
Basic Concepts and Definitions.- The Nature of Marine Sediments.- Physical Properties.- Geoacoustic Properties.- Seafloor Roughness.- Sediment Heterogeneity.- Fluid Theories.- Elastic Theories.- Poroelastic Theories.- Reflection.- Seafloor Scattering Experiments.- Roughness Scattering Models.- Sediment Volume Scattering.- Acoustic Penetration of the Seafloor.- Backscatter Statistics.