Movement of acoustic energy in the ocean

Movement of acoustic energy in the ocean / Vladimir A. Shchurov.

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...

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Bibliographic Details
Main Author: Shchurov, Vladimir A. (Author)
Format: eBook
Language:English
Published: Singapore : Springer, 2022.
Subjects:
Underwater acoustics.
Underwater acoustics
Online Access:Click for online access
Table of 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
  • 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
  • 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
  • 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
  • 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

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