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Acoustics In Moving Inhomogeneous Media

Author: Vladimir E. Ostashev
Publisher: CRC Press
ISBN: 9780419224303
Size: 24.65 MB
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This is the first book to offer a complete and rigorous study of sound propagation and scattering in moving media that have regular and random inhomogeneities in adiabatic sound speed, density and medium velocity. The book is an invaluable resource for engineers and scientists who work on outdoor noise control, on acoustical detection and ranging in the atmosphere, and on acoustal remote sensing of the atmosphere and ocean, whether they are based in the industry, or government and military laboritories and institutions. It will be required reading for researchers who use numerical methods in these fields and in its step by step approach makes it an important reference for teachers and graduate students.

Acoustics In Moving Inhomogeneous Media Second Edition

Author: Vladimir E. Ostashev
Publisher: CRC Press
ISBN: 1482266652
Size: 72.97 MB
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Introduces Systematic Formulations for Use in Acoustic Applications Acoustics in Moving Inhomogeneous Media, Second Edition offers a uniquely complete and rigorous study of sound propagation and scattering in moving media with deterministic and random inhomogeneities. This study is of great importance in many fields including atmospheric and oceanic acoustics, aeroacoustics, acoustics of turbulent flows, remote sensing of the atmosphere and ocean, noise pollution in the atmosphere, and wave propagation. Provides Sensible Explanations Using Step-by-Step Practice The book begins by considering sound propagation through moving media with deterministic inhomogeneities such as vertical profiles of temperature and wind velocity in the atmosphere. It moves on to a new study of sound propagation and scattering in media with random inhomogeneities in adiabatic sound speed, density, and medium velocity. Then this second edition newly sets out state-of-the-art numerical methods for calculating the sound field and its statistical characteristics in moving inhomogeneous media, which is particularly useful for those working in atmospheric acoustics and studying noise pollution. Numerical codes are provided on the book’s website Covered in three parts, this second edition: Incorporates new results developed since the previous edition Rewrites and extends the text with formulations of sound propagation and scattering in random moving media Describes numerical methods for performing calculations involving equations from the first two parts Acoustics in Moving Inhomogeneous Media, Second Edition serves as the basis of a graduate course in atmospheric and oceanic acoustics or as a rigorous reference work in a wide range of fields such as atmospheric and oceanic acoustics, aeroacoustics, acoustics of turbulent flows, acoustic remote sensing, noise pollution, and wave propagation in deterministic and random media.

Acoustics Of Layered Media Ii

Author: Leonid M. Brekhovskikh
Publisher: Springer Science & Business Media
ISBN: 3662027763
Size: 13.66 MB
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This is the sequel to our book Acoustics of Layered Media I: Plane and Quasi Plane Waves (Springer Ser. Wave Phenom. , Vol. 5). Taken together, these two monographs present a systematic exposition of the theory of sound propagation in inhomogeneous media, which starts from first principles and includes recent results. More advanced topics are considered in this second volume. Although the theory of wave beams and fields of localized sources is more sophisticated than the theory of quasi-plane waves, it embraces a much wider range of interesting problems that are also important for applications. We exploit the results of Acoustics of Layered Media I, as long as it is expedient to consider sound fields as a superposition of plane or quasi-plane waves. However, the knowledgeable reader will view this book as self-contained. Similar topics have been treated in the book by L. M. Brekhovskikh, Waves in Layered Media, the English version of the second edition of which was published by Academic Press in 1980. Since Waves in Layered Media became very popular, we have tried here to retain its spirit. However, the majority of this text is devoted to new material which reflects the significant progress of the theory during recent years. In particular, acoustic fields in a moving fluid are considered and much attention is paid to sound propagation in range dependent environments, which is currently on the leading edge of research activities.

Distributed Sensor Networks Second Edition

Author: S. Sitharama Iyengar
Publisher: CRC Press
ISBN: 1439862834
Size: 40.17 MB
Format: PDF, Docs
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The best-selling Distributed Sensor Networks became the definitive guide to understanding this far-reaching technology. Preserving the excellence and accessibility of its predecessor, Distributed Sensor Networks, Second Edition once again provides all the fundamentals and applications in one complete, self-contained source. Ideal as a tutorial for students or as research material for engineers, the book gives readers up-to-date, practical insight on all aspects of the field. Revised and expanded, this second edition incorporates contributions from many veterans of the DARPA ISO SENSIT program as well as new material from distinguished researchers in the field. Image and Sensor Signal Processing focuses on software issues and the history and future of sensor networks. The book also covers information fusion and power management. Readers of this book may also be interested in Distributed Sensor Networks, Second Edition: Sensor Networking and Applications (ISBN: 9781439862872).

Computational Acoustics

Author: David R. Bergman
Publisher: John Wiley & Sons
ISBN: 1119277337
Size: 56.49 MB
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Covers the theory and practice of innovative new approaches to modelling acoustic propagation There are as many types of acoustic phenomena as there are media, from longitudinal pressure waves in a fluid to S and P waves in seismology. This text focuses on the application of computational methods to the fields of linear acoustics. Techniques for solving the linear wave equation in homogeneous medium are explored in depth, as are techniques for modelling wave propagation in inhomogeneous and anisotropic fluid medium from a source and scattering from objects. Written for both students and working engineers, this book features a unique pedagogical approach to acquainting readers with innovative numerical methods for developing computational procedures for solving problems in acoustics and for understanding linear acoustic propagation and scattering. Chapters follow a consistent format, beginning with a presentation of modelling paradigms, followed by descriptions of numerical methods appropriate to each paradigm. Along the way important implementation issues are discussed and examples are provided, as are exercises and references to suggested readings. Classic methods and approaches are explored throughout, along with comments on modern advances and novel modeling approaches. Bridges the gap between theory and implementation, and features examples illustrating the use of the methods described Provides complete derivations and explanations of recent research trends in order to provide readers with a deep understanding of novel techniques and methods Features a systematic presentation appropriate for advanced students as well as working professionals References, suggested reading and fully worked problems are provided throughout An indispensable learning tool/reference that readers will find useful throughout their academic and professional careers, this book is both a supplemental text for graduate students in physics and engineering interested in acoustics and a valuable working resource for engineers in an array of industries, including defense, medicine, architecture, civil engineering, aerospace, biotech, and more.

Fundamentals Of Physical Acoustics

Author: David T. Blackstock
Publisher: John Wiley & Sons
ISBN: 9780471319795
Size: 66.34 MB
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Blackstock (mechanical engineering, U. of Texas) presents an introductory textbook on the physics of sound written for a two-semester graduate-level course. For part of the book, he attempts to keep the mathematics at a fairly basic level, while covering such topics as propagation, reflection and tr.

Aeroacoustics Of Low Mach Number Flows

Author: Stewart Glegg
Publisher: Academic Press
ISBN: 0128097930
Size: 17.29 MB
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Aeroacoustics of Low Mach Number Flows: Fundamentals, Analysis, and Measurement provides a comprehensive treatment of sound radiation from subsonic flow over moving surfaces, which is the most widespread cause of flow noise in engineering systems. This includes fan noise, rotor noise, wind turbine noise, boundary layer noise, and aircraft noise. Beginning with fluid dynamics, the fundamental equations of aeroacoustics are derived and the key methods of solution are explained, focusing both on the necessary mathematics and physics. Fundamentals of turbulence and turbulent flows, experimental methods and numerous applications are also covered. The book is an ideal source of information on aeroacoustics for researchers and graduate students in engineering, physics, or applied math, as well as for engineers working in this field. Supplementary material for this book is provided by the authors on the website The website provides educational content designed to help students and researchers in understanding some of the principles and applications of aeroacoustics, and includes example problems, data, sample codes, course plans and errata. The website is continuously being reviewed and added to. Explains the key theoretical tools of aeroacoustics, from Lighthill’s analogy to the Ffowcs Williams and Hawkings equation Provides detailed coverage of sound from lifting surfaces, boundary layers, rotating blades, ducted fans and more Presents the fundamentals of sound measurement and aeroacoustic wind tunnel testing

Wave Propagation In A Random Medium

Author: Lev A. Chernov
Publisher: Courier Dover Publications
ISBN: 0486821471
Size: 17.64 MB
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Ground-breaking contribution to the literature, widely used by scientists, engineers, and students. Topics include theory of wave propagation in randomly inhomogeneous media, ray and wave theories of scattering at random inhomogeneities, more. 1960 edition.

Nonlinear Wave Processes In Acoustics

Author: K. Naugolnykh
Publisher: Cambridge University Press
ISBN: 9780521399845
Size: 66.87 MB
Format: PDF
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The investigation of nonlinear phenomena in acoustics has a rich history stretching back to the mechanical physical sciences in the nineteenth century. The study of nonlinear phenomena, such as explosions and jet engines, prompted the sharp growth of interest in nonlinear acoustic phenomena. In this book, the authors consider models of different "acoustic" media as well as equations and behavior of finite-amplitude waves. The authors also consider the effects of nonlinearity, dissipation, dispersion, and for two- and three-dimensional problems, reflection and diffraction on the evolution and interaction of acoustic beams. This book will be of interest not only to specialists in acoustics, but also to a wide audience of mathematicians, physicists, and engineers working on nonlinear waves in various physical systems.

Acoustics Of Layered Media I

Author: Leonid M. Brekhovskikh
Publisher: Springer Science & Business Media
ISBN: 3642523692
Size: 12.81 MB
Format: PDF, Kindle
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This monograph is devoted to the systematic presentation of the theory of sound wave propagation in layered structures. These structures can be man-made, such as ultrasonic filters, lenses, surface-wave delay lines, or natural media, such as the ocean and the atmosphere, with their marked horizontal stratification. A related problem is the propagation of elastic (seismic) waves in the earth's crust These topics have been treated rather completely in the book by L. M. Brek hovskikh, Waves in Layered Media, the English version of the second edition of which was published by Academic Press in 1980. Due to progress in experimental and computer technology it has become possible to analyze the influence of factors such as medium motion and density stratification upon the propagation of sound waves. Much attention has been paid to propagation theory in near-stratified media, Le. , media with small deviations from strict stratification. Interesting results have also been obtained in the fields of acoustics which had been previously considered to be "completely" developed. For these reasons, and also because of the inflow of researchers from the related fields of physics and mathematics, the circle of persons and research groups engaged in the study of sound propagation has rather expanded. Therefore, the appearance of a new summary review of the field of acoustics of layered media has become highly desirable. Since Waves in Layered Media became quite popular, we have tried to retain its positive features and general structure.