This book is a new and improved version of a previous work which was successful because of its approach to defining the essential basic knowledge required by someone working in the field of sonar – using a practical approach – combined with concrete examples of industrial applications. It brings together in a single volume a treatment of all the various problems which face designers and users of sonar systems.
The book covers a large, yet detailed array of the problems encountered in underwater acoustics as they are relevant to sonar applications. This ranges from the physical phenomena governing the environment and the corresponding sonar constraints, by way of techniques for the definition of transducers and antennas, to the associated types of signal processing. An underwater acoustic measurement approach is also detailed.
The scope of this book is unprecedented, and it is therefore of greater value to a student, researcher or engineer than many other works in this field, which are usually very specific. The book also provides technicians in the field with an introduction and a general survey of the problems that may be faced, and enables a wider public to gain a basic understanding of underwater acoustics and sonar.
PART 1. THE MARINE ENVIRONMENT
2. Sound Propagation in the Marine Environment.
3. Noises and Reverberation.
4. Radiated and Inherent Noises.
5. Transmission of the Acoustic Signal: Sonar Equations.
PART 2. ACOUSTIC-ELECTRIC INTERFACE ANTENNA STRUCTURES
6. Electric-acoustic and Acoustic-electric Transformations.
7. Performance and Structures of Acoustic Antennas.
8. Electronic Transducer-hydrophone Adaptation.
9. Electro-mechano-acoustic Analogies.
PART 3. PROCESSING CHAIN OF ACTIVE SONAR
10. Selection Criteria in Active Processing.
11. Processing Chain in Active Sonar.
12. Basic Theoretical Notions in Active Processing.
13. Measurement in Underwater Acoustics.
Appendix 1. Logarithmic Scales.
Appendix 2. Equation of Sound in Fluids.
Appendix 3. Piezoelectricity Fundamentals.
Appendix 4. Vector Analysis Fundamentals.
Appendix 5. Reciprocity Theorem.
Appendix 6. Concrete Example of Uncertainty Estimation Based on the Reciprocity Calibration Method.
Jean-Paul Marage is currently retired from his main activities as an electronic engineer. He has formerly held positions as a CNAM electronic engineer; an Ecole Supérieure d’Electricité engineer for SUPELEC Paris; and was Manager, for 25 years, of the Research and development laboratory at Thales Underwater Systems, Sophia Antipolis, France. He also worked as an acoustic and electronic sonar system expert for 5 years and a CNAM (Conservatoire National des Arts et Métiers) teacher in electronics for 25 years.
Yvon Mori, although retired from his main activities as an electronic engineer, is still Chairman of the SEE French Riviera (Société de l’Electricité, de l’Electronique et des Technologies de l’Information et de la Communication) and the IEEE in France. He is also a COFRAC Auditor for programme 38 and trains engineers in mechanical vibration, shock analysis and electromagnetic compatibility for major companies. Before retirement he was, for 37 years, the manager of the environmental test and evaluation laboratory at Thales Underwater Systems in Sophia Antipolis, France.
Table of Contents
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