Long Range Acoustic Propagation Through Internal Wave Fields
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The Effect of Internal Waves on Long Range Acoustic Propagation in the Ocean
Author | : Richard Jay Jaffee |
Publisher | : |
Total Pages | : 270 |
Release | : 1976 |
Genre | : Sound-waves |
ISBN | : |
Sound Propagation through the Stochastic Ocean
Author | : John A. Colosi |
Publisher | : Cambridge University Press |
Total Pages | : 443 |
Release | : 2016-06-20 |
Genre | : Mathematics |
ISBN | : 1107072344 |
In this book, key discoveries in the field of statistical ocean acoustics over the last 35 years are addressed with illustrations from ocean observations.
Sound Propagation Through Directional Internal Wave Fields
Author | : J. A. Neubert |
Publisher | : |
Total Pages | : 25 |
Release | : 1984 |
Genre | : |
ISBN | : |
Acoustic propagation can be used to discern directional internal waves in ambient ocean internal wave fields. The Rytov method gives the mean square sound-level fluctuations and the mean square phase fluctuations as a function for the fluctuating component of the refractive index. These relations are valid throughout the unsaturated regime of sound fluctuations. The propagating vertical displacement of the directional internal wave field is formed, and from its correlation lengths the necessary correlation lengths the necessary correlation function can be obtained. Thence, for the directional internal wave field are found. Next and for expected horizontally isotropic ambient internal wave field are determined by manipulation of the Garrett and Munk spectrum. This technique can be applied to the detection of a directional internal wave in a background field of horizontally isotropic ambient internal waves as shown in the example. Keywords include: underwater acoustics, Acoustic propagation, Rytov method.
The Effect of Internal Waves on Long Range Acoustic Propagation in the Ocean
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1905 |
Genre | : |
ISBN | : |
Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution May, 1976.
Infrasound Propagation in an Anisotropic Fluctuating Atmosphere
Author | : Igor Chunchuzov |
Publisher | : Cambridge Scholars Publishing |
Total Pages | : 355 |
Release | : 2020-02-28 |
Genre | : Science |
ISBN | : 1527547760 |
This book presents the theory and results of experimental studies of the propagation of infrasound waves in a real atmosphere with its inherent fine-scale layered structure of wind speed and temperature. It is motivated by the fact that the statistical characteristics of anisotropic (or layered) fluctuations of meteorological fields, the horizontal scales of which significantly exceed their vertical scales, have been very poorly studied compared to those of locally isotropic turbulence in the inertial range of scales. This book addresses this lacuna by developing a theory of the formation of anisotropic inhomogeneities of the atmosphere in a random field of internal gravity waves and vortex structures. Using theory, it explains numerous experimental data depicting the influence of the fine structure of the atmosphere on the propagation of infrasound waves from pulsed sources. The text will appeal to specialists in the fields of acoustics and optics of the atmosphere, remote sensing of the atmosphere, the dynamics of internal waves, nonlinear acoustics, and infrasound monitoring of explosions and natural hazards.
Inverting for Source Location and Internal Wave Strength Using Long Range Ocean Acoustic Signals
Author | : Kevin Donn Heaney |
Publisher | : |
Total Pages | : 604 |
Release | : 1997 |
Genre | : Internal waves |
ISBN | : |
Ray and Wave Chaos in Ocean Acoustics
Author | : Denis Makarov |
Publisher | : World Scientific |
Total Pages | : 412 |
Release | : 2010 |
Genre | : Science |
ISBN | : 9814273171 |
A systematic study of chaotic ray dynamics in underwater acoustic waveguides began in the mid-1990s when it was realized that this factor plays a crucial role in long-range sound propagation in the ocean. The phenomenon of ray chaos and its manifestation at a finite wavelength ? wave chaos ? have been investigated by combining methods from the theory of wave propagation and the theory of dynamical and quantum chaos. This book is the first monograph summarizing results obtained in this field. Emphasis is made on the exploration of ray and modal structures of the wave field in an idealized environmental model with periodic range dependence and in a more realistic model with sound speed fluctuations induced by random internal waves. The book is intended for acousticians investigating the long-range sound transmission through the fluctuating ocean and also for researchers studying waveguide propagation in other media. It will be of major interest to scientists working in the field of dynamical and quantum chaos.
Underwater Acoustics and Ocean Dynamics
Author | : Lisheng Zhou |
Publisher | : Springer |
Total Pages | : 126 |
Release | : 2016-10-17 |
Genre | : Science |
ISBN | : 9811024227 |
These proceedings are a collection of 16 selected scientific papers and reviews by distinguished international experts that were presented at the 4th Pacific Rim Underwater Acoustics Conference (PRUAC), held in Hangzhou, China in October 2013. The topics discussed at the conference include internal wave observation and prediction; environmental uncertainty and coupling to sound propagation; environmental noise and ocean dynamics; dynamic modeling in acoustic fields; acoustic tomography and ocean parameter estimation; time reversal and matched field processing; underwater acoustic localization and communication as well as measurement instrumentations and platforms. These proceedings provide insights into the latest developments in underwater acoustics, promoting the exchange of ideas for the benefit of future research.