This book provides a critical evaluation of the data and models pertaining to high-frequency acoustic interaction with the seafloor, which will be of interest to researchers in underwater acoustics and to developers of sonars.

Models and data are presented so as to be readily usable, backed up by extensive explanation. Much of the data is new, and the discussion in on two levels: concise descriptions in the main text backed up by extensive technical appendices.

Contents
1 Introduction
2 Basic Concepts and Definitions
3 The Nature of Marine Sediments
4 Physical Properties
5 Geoacoustic Properties
6 Seafloor Roughness
7 Sediment Heterogeneity
8 Fluid Theories
9 Elastic Theories
10 Poroelastic Theories
11 Reflection
12 Seafloor Scattering Experiments
13 Roughness Scattering Models
14 Sediment Volume Scattering
15 Acoustic Penetration of the Seafloor
16 Backscatter Statistics
A List of Symbols
B Calculation of Properties of Seawater
C Coeffcient of Variation of Sediment Parameters
D Roughness and Volume Statistics
E Complex Representation of Signals
F Acoustic Transducers
G Acoustic Measurements
H Measurement Units and Decibels
I Causality Constraints on Speed-Attenuation Relations
J The Scattering Cross Section and Plane Waves
K Rough-Interface Perturbation Theory
L The Kirchhoff and Small-Slope Approximations
M Volume Perturbation Theory
References
Index

Download File Size:6.84 MB

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