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. It 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.
Author(s): Darrell Jackson, Michael Richardson
Edition: 1
Year: 2006
Language: English
Pages: 573
Cover......Page 1
Half Title......Page 2
Series Info......Page 3
Title......Page 4
Copyright......Page 5
Dedication......Page 6
Series Preface......Page 7
Acknowledgments......Page 8
Contents......Page 9
1 Introduction......Page 15
2 Basic Concepts and Definitions......Page 21
3 The Nature of Marine Sediments......Page 42
4 Physical Properties......Page 87
5 Geoacoustic Properties......Page 135
6 Seafloor Roughness......Page 183
7 Sediment Heterogeneity......Page 213
8 Fluid Theories......Page 256
9 Elastic Theories......Page 277
10 Poroelastic Theories......Page 294
11 Reflection......Page 317
12 Seafloor Scattering Experiments......Page 329
13 Roughness Scattering Models......Page 339
14 Sediment Volume Scattering......Page 385
15 Acoustic Penetration of the Seafloor......Page 415
16 Backscatter Statistics......Page 429
A List of Symbols......Page 451
B Calculation of Properties of Seawater......Page 462
C Coeffcient of Variation of Sediment Parameters......Page 476
D Roughness and Volume Statistics......Page 479
E Complex Representation of Signals......Page 489
F Acoustic Transducers......Page 491
G Acoustic Measurements......Page 497
H Measurement Units and Decibels......Page 512
I Causality Constraints on Speed–Attenuation Relations......Page 514
J The Scattering Cross Section and Plane Waves......Page 522
K Rough-Interface Perturbation Theory......Page 532
L The Kirchhoff and Small-Slope Approximations......Page 545
M Volume Perturbation Theory......Page 551
References......Page 561
Index......Page 606
