Last edited by Tugrel
Monday, May 11, 2020 | History

2 edition of survey of underwater-acoustic ray tracing techniques found in the catalog.

survey of underwater-acoustic ray tracing techniques

R. Michael Jones

survey of underwater-acoustic ray tracing techniques

by R. Michael Jones

  • 362 Want to read
  • 4 Currently reading

Published by U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories in Boulder, Colo .
Written in English

    Subjects:
  • Geometrical optics -- Computer programs.,
  • Underwater acoustics -- Computer programs.,
  • Radio wave propagation -- Computer programs.

  • Edition Notes

    StatementR.M. Jones.
    SeriesNOAA technical memorandum ERL WPL -- 111
    ContributionsEnvironmental Research Laboratories (U.S.)
    The Physical Object
    Paginationiv, 68 p. ;
    Number of Pages68
    ID Numbers
    Open LibraryOL17076837M

    You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.   In the first, computerized auralization was outlined remarkably early, long before the term auralization was introduced. In the second, a ray tracing technique in room acoustics was presented. Independently, Asbj½rn Krokstad and colleagues in Norway worked on the ray tracing technique, which lead to a journal paper in Author: Asbjørn Krokstad, U. Peter Svensson, Svein Strøm.

      Underwater Aacoustic System Analysis provides a comprehensive exploration of underwater acoustics, acoustic signal generation, and acoustic signal processing for the practicing systems analyst and systems engineer. This second edition, first published in Price: $ Ray Tracing COFFEE (Design Exercise) Ray Tracing Normal Modes LUNCH Scattering and Target Strength Noise TEA (Design Exercise) Noise and Propagation Presentation EVENING MEAL Delegate-led design example Wednesday: Reverberation, Active Sonar ROC & Narrow-band Passive Sonar Processing

    The pace of development in underwater acoustic systems has accelerated over the past few decades, with rapid advancement in sonar technology stemming from improvements in geographic positioning capabilities, computer processing power, and sonar hardware and software design (Mayer, , Stanton, ).This has been especially apparent with multibeam echo sounder (MBES) systems ().Cited by: acoustic propagation simulator based on ray tracing (Bellhop) will be considered. Next, the deterministic model will be combined with an empirical model derived from real data collected at sea, which will reflect the channel’s dynamic behavior. Lastly, from the acoustic propagation model, important.


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Survey of underwater-acoustic ray tracing techniques by R. Michael Jones Download PDF EPUB FB2

Get this from a library. A survey of underwater-acoustic ray tracing techniques. [R Michael Jones; Environmental Research Laboratories (U.S.)]. One of the most popular ray tracing tools used in the UASN literature is called BELLHOP model that is designed to perform acoustic ray tracing for a given speed of sound profile and absorbing.

In physics, ray tracing is a method for calculating the path of waves or particles through a system with regions of varying propagation velocity, absorption characteristics, and reflecting these circumstances, wavefronts may bend, change direction, or reflect off surfaces, complicating analysis.

Ray tracing solves the problem by repeatedly advancing idealized narrow beams called. Underwater acoustics is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with survey of underwater-acoustic ray tracing techniques book water, its contents and its boundaries.

The water may be in the ocean, a lake, a river or a l frequencies associated with underwater acoustics are between 10 Hz and 1 propagation of sound in the ocean at frequencies lower than In book: Modeling and Measurement Methods for Acoustic Waves and for Acoustic Microdevices (pp) Chapter: Ray Trace Modeling of Underwater Sound Propagation.

Ray acoustics and ray tracing techniques are the most intuitive and often the simplest means for modeling sound propagation in the sea.

Ray acoustics is based on the assumption that sound propagates along rays that are normal to wave fronts, the surfaces of constant phase of the acoustic by: 4.

"This book is a general survey of Underwater Acoustics, intended to make the subject ‘as easily accessible as possible, with a clear emphasis on applications.’ In this the author has succeeded, with a wide variety of subjects presented with minimal derivation.

There is an emphasis on technology and on intuitive physical explanation ."Cited by:   This paper addresses an Open MPI based parallel implementation of a three-dimensional ray tracing model for predictions of acoustic pressure.

Data from a tank scale experiment, providing waveguide parameters and TL measurements, are used to test the accuracy of the ray model and the performance of the proposed parallel : Rogério M.

Calazan, Orlando C. Rodríguez, Nadia Nedjah. The difference between ray tracing and the level set method is in the representation of the solution.

With ray tracing, the ordinary differential equations (5) are solved along the ray from a starting point, x 0, on the initial wavefront. Often these equations are parameterized. I am looking for an open-source Java-based raytracing system suitable for use in modeling underwater ray-based acoustics.

Such a package might be similar to the Comprehensive Acoustic System Simulation (CASS) with the Gaussian Ray Bundle (GRAB) but I would prefer an open-source, free-to-use or free-to-modify model that I can use in presentations to an open forum (e.g., JavaOne). Eigenray Eigenray Acoustic Ray Tracing Code (updated August ) (B.

Dushaw, Applied Physics Laboratory, U. Washington) Describes a Fortran ray model which follows closely the Bowlin ray code "Ray" (written in C) and drawing on earlier work with John Colosi. This version is optimized for long-range, deep-water calculations.

Get this from a library. Underwater acoustic systems. [R F W Coates] -- Part of a series which is aimed primarily at a professional engineering or postgraduate student audience, this book concerns the basics of the propagation of sound in the sea, the problems of.

PlaneRay is a ray-tracing program for modelling underwater acoustic propagation that can treat moderately range-varying scenarios and has capabilities much like Bellhop.

The calculation starts with calculating the ray trajectories followed by a unique sorting and interpolation routine for efficient determination of a large number of eigenrays Author: Jens Martin Hovem, Hefeng Dong.

Due to harsh underwater acoustic medium described above, many well known communication techniques cannot be applied and hence the design is a compromise between data rate, reliability and distance. The combined effects of the above mentioned phenomenon have led in the past to system design based exclusively on noncoherentFile Size: KB.

Presented in a clear and concise way as an introductory text and practical handbook, the book provides the basic physical phenomena governing underwater acoustical waves, propagation, reflection, target backscattering and noise.

It covers the general features of sonar systems, transducers and arrays, signal processing and performance evaluation/5(2). area of Underwater Acoustic Sensor Networks (UASNs) is at a snail’s pace due to the difficulties arising in transferring most of the land and air based WSNs’ state-of-the-art to their underwater equivalent.

Maximum underwater deployments rely on acoustics for enabling communication combined withFile Size: 1MB. Applied Underwater Acoustics meets the needs of scientists and engineers working in underwater acoustics and graduate students solving problems in, and preparing theses on, topics in underwater acoustics.

The book is structured to provide the basis for rapidly assimilating the essential underwater acoustic knowledge base for practical application to daily research and analysis.

The MB-System ™ Cookbook provides detailed examples regarding the processing of swath mapping data using the MB-System ™ open-source software package. Step-by-step instructions, explanations, code (scripts), data files and processed results are provided for each example. The examples use real data files, with typical data irregularities.

Vessel underwater acoustic survey We want to help you operate the quietest fleets in service. Get ahead of the curve. Address the increasing concern regarding the noise level produced by seagoing vessels and its effect on marine life with LR’s Vessel Underwater Acoustics Survey service.

This book presents the diverse areas of underwater acoustic signal processing and communication systems through a collection of contributions from prominent researchers in these areas. Their results, both new and those published over the past few years, have been assembled to provide what we hope is a comprehensive overview of the recent Brand: Robert Istepanian.

This book divides the subject of underwater acoustic modeling into three fundamental aspects: the physical principles used to formulate underwater acoustic models the mathematical techniques used to translate these principles into computer models and modeling applications in sonar technology and oceanographic research.CHAPTER 9 UNDERWATER ACOUSTICS Robert E.

Randall Ocean Engineering Program Civil Engineering Department Texas A&M University College Station, Texas, USA CONTENTS INTRODUCTION, Early History, Underwater Acoustic System Categories, Underwater Sound Fundamentals, Decibel Scales, SONAR EQUATIONS, Active Sonar Equation.

The great variability usually found in underwater media makes modeling a challenging task, but helpful for better understanding or predicting the performance of future deployed systems.

In this work, an underwater acoustic propagation model is presented. This model obtains the multipath structure by means of the ray tracing technique. Using this model, the behavior of a relative positioning Cited by: 6.