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Author : Bao-Wen Li
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (636 download)
Download or read book Sound Propagation in Turbulent Media written by Bao-Wen Li and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (455 download)
Download or read book Development of the Modern Theory of Sound Propagation in the Turbulent Atmosphere written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The foundations of the modern theory of sound propagation and scattering in a homogeneous and isotropic atmospheric turbulence are developed: The sound scattering cross-section for von Karman spectra of temperature and wind velocity fluctuations is calculated; the rigouros theory of line of sight sound propagation in an atmosphere with Kolmogorov, Gaussian and von Karman spectra of temperature and wind velocity fluctuations is developed; a new theoretical formulation of the interference of the direct wave from source to receiver and that reflected from the ground in a turbulent atmosphere is presented; the sound scattering cross section in an atmosphere with arbitrary profiles of temperature and wind velocity is calculated; some predictions of the modern theory are verified experimentally; correct wideangle parabolic equations for sound waves in a turbulent atmosphere are derived and used for numerical simulations of sound propagation. The modern theory has already been adopted by scientists for calculations of sound propagation in turbulent media and as a basis for development of new acoustic remote sensing techniques of the atmosphere and ocean in several countries and organizations including the U.S. Army Research Laboratory.
Author : Thomas Rossing
Publisher : Springer Science & Business Media
ISBN 13 : 0387304460
Total Pages : 1179 pages
Book Rating : 4.3/5 (873 download)
Download or read book Springer Handbook of Acoustics written by Thomas Rossing and published by Springer Science & Business Media. This book was released on 2007-06-21 with total page 1179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.
Author : Bao-Wen Li
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (311 download)
Download or read book Sound Propagation in Turbulent Media written by Bao-Wen Li and published by . This book was released on 1992 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vladimir E. Ostashev
Publisher : CRC Press
ISBN 13 : 9780415564168
Total Pages : 0 pages
Book Rating : 4.5/5 (641 download)
Download or read book Acoustics in Moving Inhomogeneous Media, Second Edition written by Vladimir E. Ostashev and published by CRC Press. This book was released on 2015-08-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 www.crcpress.com/product/isbn/9780415564168 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.
Author : Valerʹi︠a︡n Ilʹich Tatarskiĭ
Publisher :
ISBN 13 :
Total Pages : 492 pages
Book Rating : 4.0/5 ( download)
Download or read book The Effects of the Turbulent Atmosphere on Wave Propagation written by Valerʹi︠a︡n Ilʹich Tatarskiĭ and published by . This book was released on 1971 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Valerian Ilich Tatarski
Publisher : Courier Dover Publications
ISBN 13 : 0486810291
Total Pages : 305 pages
Book Rating : 4.4/5 (868 download)
Download or read book Wave Propagation in a Turbulent Medium written by Valerian Ilich Tatarski and published by Courier Dover Publications. This book was released on 2016-12-14 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph describes the phenomena associated with the propagation of electromagnetic and acoustic waves through atmospheric turbulence. Geared toward specialists in radiophysics and atmospheric acoustics and optics, the treatment is also suitable for advanced undergraduates and graduate students. The author stresses applications to phase and amplitude fluctuations, scintillation of stars, radio scattering, and other problems. Part I covers topics from the theory of random fields and turbulence theory, including statistical description. Part II, on the scattering of waves in the turbulent atmosphere, is supplemented by an appendix on scattering of acoustic radiation. Part III offers a detailed presentation of line-of-sight propagation of acoustic and electromagnetic waves through a turbulent medium. Part IV concludes the text with a comparison of theory with experimental data
Author :
Publisher :
ISBN 13 :
Total Pages : 198 pages
Book Rating : 4.:/5 (227 download)
Download or read book Sound Propagation Through a Turbulent Atmosphere: Experimental Techniques and Data Analysis written by and published by . This book was released on 1987 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propagation of sound waves close to the ground is a complex problem involving many interesting mechanisms. In addition to geometrical spreading and molecular absorption, which are reasonably well understood, the three main mechanisms which influence the acoustic field are reflection with phase change due to the finite impedence of the ground, refraction by wind and temperature gradients, and scattering by atmospheric turbulence. Outdoor sound propagation in a turbulent medium is not a well understood process and has only recently begun to receive serious attention. This report is the first of a series of reports on sound propagation through a turbulent atmosphere. It documents the experimental configuration and describes data analysis. The data analysis includes plots of the real and imaginary parts of the acoustic pressure as a function of time (scatter plots), probability of observing a particular amplitude, and the more familiar structure functions. A preliminary analysis of data suggests reasonable agreement in structure functions at frequencies of 500 Hz and above. At lower frequencies, phase and log amplitude structure functions are both larger than predicted from theory. A tentative explanation for this difference is under development and will be presented in the third of the three volume series. The second volume will be devoted to refractive effects. Keywords: Computer programs; Outdoor sound.
Author : Richard H. Lyon
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)
Download or read book Diffusion of Sound Waves in a Turbulent Atmosphere written by Richard H. Lyon and published by . This book was released on 1960 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vitale Abagnali
Publisher :
ISBN 13 : 9781614700012
Total Pages : 0 pages
Book Rating : 4.7/5 ( download)
Download or read book Sound Waves written by Vitale Abagnali and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the authors present current research in the study of the propagation, frequency and effects of sound waves. Topics discussed include time resolved visualisation and analysis on a single short acoustic wave generation; elastic vibrations of an isotropic plate with laser-induced atomic defects; sound velocity into turbulent medium; infrasound generation by turbulent convection; neutrons diffraction in a crystal under the influence of a sound wave; and, the transformation of sound waves in non-stationary media.
Author : Vladimir E. Ostashev
Publisher : CRC Press
ISBN 13 : 9780419224303
Total Pages : 276 pages
Book Rating : 4.2/5 (243 download)
Download or read book Acoustics in Moving Inhomogeneous Media written by Vladimir E. Ostashev and published by CRC Press. This book was released on 1997-12-04 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : Vladimir E. Ostashev
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (12 download)
Download or read book Statistical Characterization of Sound Propagation Over Vertical and Slanted Paths in a Turbulent Atmosphere written by Vladimir E. Ostashev and published by . This book was released on 2018 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most previous research on sound propagation in the turbulent atmosphere has focused on nearly horizontal propagation. Sound propagation over vertical and slanted paths is fundamentally different from horizontal propagation in that the variances and length scales of the turbulence depend on the height above the ground. In this paper, propagation over vertical and slanted paths is studied using approaches and methods developed for wave propagation through inhomogeneous, random media. Statistical characteristics of sound signals such as the extinction coefficient of the mean sound field, the strength parameter, the transverse mutual coherence function, the coherence radius, and the correlation functions and variances of the phase and log-amplitude fluctuations are calculated for arbitrary spectra of temperature and wind velocity fluctuations, and then specialized to the von Kármán model for the turbulence spectra. The extinction coefficient and coherence radius are analyzed numerically for various meteorological conditions of the atmospheric boundary layer. The results obtained are compared with those for near-horizontal sound propagation. The theory has applications to localization of elevated sound sources with ground-based microphone arrays, and the detection of ground-based sources with elevated arrays.
Author : J.F. Allard
Publisher : Springer Science & Business Media
ISBN 13 : 9401118663
Total Pages : 296 pages
Book Rating : 4.4/5 (11 download)
Download or read book Propagation of Sound in Porous Media written by J.F. Allard and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has grown out of the research activities of the author in the fields of sound propagation in porous media and modelling of acoustic materials. It is assumed that the reader has a background of advanced calculus, including an introduction to differential equations, complex variables and matrix algebra. A prior exposure to theory of elasticity would be advantageous. Chapters 1-3 deal with sound propagation of plane waves in solids and fluids, and the topics of acoustic impedance and reflection coefficient are given a large emphasis. The topic of flow resistivity is presented in Chapter 2. Chapter 4 deals with sound propagation in porous materials having cylindrical pores. The topics of effective density, and of tortuosity, are presented. The thermal exchanges between the frame and the fluid, and the behaviour of the bulk modulus of the fluid, are described in this simple context. Chapter 5 is concerned with sound propagation in other porous materials, and the recent notions of characteristic dimensions, which describe thermal exchanges and the viscous forces at high frequencies, are introduced. In Chapter 6, the case of porous media having an elastic frame is considered in the context of Biot theory, where new topics described in Chapter 5 have been included.
Author : Alan R. Wenzel
Publisher :
ISBN 13 :
Total Pages : 94 pages
Book Rating : 4.:/5 (548 download)
Download or read book Propagation of Acoustic Waves in a Turbulent Medium written by Alan R. Wenzel and published by . This book was released on 1970 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vladimir Ostashev
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (852 download)
Download or read book Waveguide Sound Propagation in a Turbulent Atmosphere Above Randomly Rough Ground written by Vladimir Ostashev and published by . This book was released on 2012 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Effects of Large and Small Scale Turbulence on Sound Propagation in the Atmosphere written by and published by . This book was released on 1995 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propagation of acoustic waves in the atmosphere is affected by several mechanisms. Two of the effects are the scattering of sound by small-scale atmospheric turbulence and fluctuation of the speed of sound gradients by the passage of large-scale atmospheric turbulence. Small- and large-scale atmospheric turbulence causes the acoustic waves to be altered by different mechanisms. Until recently, the majority of work in turbulence effect on acoustics has concentrated on the small-scale turbulence regime of the inertial subrange of the Kolmogorov spectrum. Earlier small-scale turbulence models have concentrated on the statistical-based work of Tatarski. Current turbulence models deal more with the structural nature of the turbulence because the statistical approach does not account for all of the turbulence effects being measured during acoustic propagation experiments. The large-scale turbulence problem cannot be handled very well with a statistical approach to atmospheric turbulence because the regime of the large-scale turbulence extends into the energy containing subrange or sometimes referred to as the source region. This report discusses the current and past turbulence models used to treat the effect of small- and large-scale turbulence on atmospheric acoustic propagation. (AN).
Author : Robert J. Urick
Publisher :
ISBN 13 :
Total Pages : 268 pages
Book Rating : 4.:/5 (31 download)
Download or read book Sound Propagation in the Sea written by Robert J. Urick and published by . This book was released on 1979 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
