| Description |
1 online resource (196 pages) |
| Contents |
Intro -- Preface by Vladimir A. Shchurov: From Publication in Russian, 2019 (Translated from the Russian) -- Acknowledgements -- From the Editor of Publication in Russian, 2019 (Translated from the Russian) -- Contents -- 1 Vector Representation of the Acoustic Field -- 1.1 Introduction -- 1.2 Scalar and Vector Characteristics of the Acoustic Field -- 1.3 Differential Phase Relationships in Complex Acoustic Vector Fields -- 1.4 Instantaneous and Average Acoustic Intensity -- 1.5 Auto- and Cross-Spectral Energy Densities -- 1.6 Frequency Coherence Function -- 1.7 Complex Intensity Vector |
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1.8 Temporal Coherence Function -- 1.9 Fourth Statistical Moment of Acoustic Intensity -- 1.10 Conclusions -- References -- 2 Theory and Technique of Vector-Phase Underwater Acoustic Measurements -- 2.1 Introduction -- 2.2 Necessity and Sufficiency of the Vector-Phase Approach in Acoustics -- 2.3 Principle of Measuring the Sound Particle Velocity in an Acoustic Wave -- 2.4 Vector Acoustic Receiver -- 2.4.1 Basic Specifications for a Vector Receiver -- 2.4.2 Piezoceramic and Electrodynamic Vector Receivers -- 2.5 Combined Acoustic Receiver -- 2.6 Combined Underwater Acoustic Receiving Systems |
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2.6.1 Features of Acoustic Measurements in the Ocean -- 2.6.2 Bottom-Mounted Combined Receiving Systems -- 2.6.3 Free-Drifting Combined Telemetry Systems -- 2.6.4 Features of Vector Receiver Suspension in Free-Drifting Receiving Systems -- 2.6.5 Vector Receiver Systems on Unmanned Underwater Vehicles (Gliders) -- 2.7 Counterparts Outside Russia -- 2.8 Units of Measurement and Relative Levels of Measured Values -- 2.9 Conclusions -- References -- 3 Phenomenon of Compensation of Intensities of Reciprocal Energy Fluxes -- 3.1 Introduction -- 3.2 Experimental Observations of Intensity Compensation |
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3.2.1 Design of Experiment in the Deep Open Ocean -- 3.2.2 Example of Vertical Compensation of Tone Signal and Underwater Ambient Noise Along the Z Axis -- 3.2.3 Example of Horizontal Compensation in the Shallow Water Waveguide -- 3.3 Compensation of Intensity Over a Broadband of Signal and Dynamic Underwater Acoustic Noise in the Deep Open Ocean -- 3.3.1 Experimental Setup and Technique -- 3.3.2 Research Results -- 3.4 Conclusions -- References -- 4 Vortices of Acoustic Intensity Vector in the Shallow Water Waveguide -- 4.1 Introduction -- 4.2 Fundamental Relationships |
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4.2.1 Acoustic Pressure, Particle Velocity, Intensity Vector -- 4.2.2 Vector-Phase Characteristics of the Acoustic Field -- 4.2.3 Energy Streamlines -- 4.2.4 Vortex Generation Mechanism -- 4.3 Vortex Structure of the Interference Field in a Shallow Water Waveguide -- 4.3.1 Mathematical Processing of Vector Acoustic Signal -- 4.3.2 Modes and Vortices -- 4.4 Dynamics of Local Vortices -- 4.4.1 Properties of the Vector Field in the Region of Destructive Interference -- 4.4.2 Vortex of the Acoustic Intensity Vector as a Real Physical Object -- 4.5 Conclusions -- References |
| Summary |
This book highlights the advantages of the vector-phase method in underwater acoustic measurements and presents results of theoretical and experimental studies of the deep open ocean and shallow sea based on vector-phase representations. Based on the physical phenomena discovered and compensation of counter streams of energy and vortices of the acoustic intensity vector, processes of transmitting acoustic energy of a tonal signal in the real ocean are described. The book also discusses the development of advanced detection tools based on vector-phase sonar. This book provides useful content for professionals and researchers working in various fields of applied underwater acoustics |
| Notes |
5 Observing Weak Signal in Diffuse, Partially Coherent and Coherent Acoustic Noise |
| Bibliography |
Includes bibliographical references |
| Notes |
Online resource; title from PDF title page (SpringerLink, viewed June 10, 2022) |
| Subject |
Underwater acoustics.
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Underwater acoustics
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| Form |
Electronic book
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| ISBN |
9789811913006 |
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9811913005 |
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