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Author : Fujio Oda
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (844 download)
Download or read book Experimental Studies of Propagation Distortion of Finite Amplitude Noise written by Fujio Oda and published by . This book was released on with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Don A. Webster
Publisher :
ISBN 13 :
Total Pages : 148 pages
Book Rating : 4.F/5 ( download)
Download or read book Experimental Investigation of Outdoor Propagation of Finite-amplitude Noise written by Don A. Webster and published by . This book was released on 1978 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fujio Oda
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3/5 (91 download)
Download or read book Propagation Distortion of Bands of Large-amplitude Acoustic Noise written by Fujio Oda and published by . This book was released on 1960 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Don A. Webster
Publisher :
ISBN 13 :
Total Pages : 148 pages
Book Rating : 4.:/5 (31 download)
Download or read book Experimental Investigation of Outdoor Propagation of Finite-amplitude Noise written by Don A. Webster and published by . This book was released on 1978 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. A. Nelson
Publisher :
ISBN 13 :
Total Pages : 185 pages
Book Rating : 4.:/5 (227 download)
Download or read book Interaction of Finite-Amplitude Sound with Air-Filled Porous Materials written by D. A. Nelson and published by . This book was released on 1985 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation studied the propagation of high intensity sound waves through an air-filled porous material. The material is assumed to be rigid, incompressible, and homogeneous; and (2) adequately described by two properties: resistivity r and porosity Omega. The resistivity was measured as a function of velocity for static flows and found to follow the empirical relation r=r sub 1 + r sub 2 u(sgn(u). This relation is assumed to apply for acoustic signals as well. Ordinary hydrodynamic nonlinearity (which leads to shock formation) is neglected. The resulting wave equation is still nonlinear, however, because of the u sgn(u) term in the resistivity. The equation is solved in the frequency domain as an infinite set of coupled inhomogeneous Helmhholtz equations, one for each harmonic. An approximate first integral formulation of these equations gives relations for progressive waves. The source wave considered is a slightly distorted intense tone, that is, a finite- amplitude fundamental accompanied by weak higher harmonics. An approximate but analytical solution leads to predictions of excess attenuation, saturation, and phase speed reduction for the fundamental component. A more general numerical solution is used to calculate the propagation curves for the higher harmonics. The u sgn(u) nonlinearity produces a cubic distortion pattern; when the input signal is a pure tone, only odd harmonic distortion products are generated. Quantitative experiments were performed on batted Kevlar 29 having porosities in the range Omega = 0.94 to 0.98. An ad hoc model is presented to illustrate the gross nonlinear effects on absorption. Keywords: Nonlinear, Lined ducts; Reflection.
Author :
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ISBN 13 :
Total Pages : 440 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David T. Blackstock
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.3/5 (91 download)
Download or read book Research in High Intensity Sound written by David T. Blackstock and published by . This book was released on 1976 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the period 1 November 1970 to 31 October 1975 basic research in nonlinear acoustics was carried out. The research, which was both theoretical and experimental, may be separated into three major areas. In one area N waves from electric sparks were used to study propagation, focusing, and diffraction of high intensity transient waves. Research was conducted on periodic finite-amplitude waves in a second area. In particular the author studied propagation in tubes, horns, and open media; propagation in inhomogeneous media; acoustic saturation; directional characteristics of beams; and suppression of sound by sound. Finally research was done on the propagation of finite-amplitude noise, both in tubes and in open media.
Author :
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ISBN 13 :
Total Pages : 1044 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts written by and published by . This book was released on 1962-05 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 2180 pages
Book Rating : 4.0/5 ( download)
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1964 with total page 2180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 912 pages
Book Rating : 4.E/5 ( download)
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 764 pages
Book Rating : 4.F/5 ( download)
Download or read book Marine Research written by and published by . This book was released on 1969 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John W. Wescott
Publisher :
ISBN 13 :
Total Pages : 650 pages
Book Rating : 4.:/5 (89 download)
Download or read book Propagation of Sound in Air written by John W. Wescott and published by . This book was released on 1965 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bibliography contains several thousand abstracts from the unclassified literature on the propagation of sound in air. The subject is treated in depth for the years 1929 to 1963. Some abstracts on earlier works of lasting interest and many abstracts from English translations of foreign journals are included. The abstracts are grouped according to subject matter. Subject and author indexes are furnished. Accessions Document (AD and earlier ATI) numbers used by both the Defense Documentation Center (formerly ASTIA) and the Office of Technical Services (OTS) are furnished wherever possible. (Author).
Author : National Council on Marine Resources and Engineering Development (U.S.)
Publisher :
ISBN 13 :
Total Pages : 756 pages
Book Rating : 4.:/5 (318 download)
Download or read book Marine Research, Fiscal Year 1968 written by National Council on Marine Resources and Engineering Development (U.S.) and published by . This book was released on 1969 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William A. Wallace
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (471 download)
Download or read book Finite Amplitude Distortion of Progressive Sound Waves written by William A. Wallace and published by . This book was released on 1952 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : I. Malecki
Publisher : Elsevier
ISBN 13 : 1483158713
Total Pages : 770 pages
Book Rating : 4.4/5 (831 download)
Download or read book Physical Foundations of Technical Acoustics written by I. Malecki and published by Elsevier. This book was released on 2013-10-22 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical Foundations of Technical Acoustics discusses theoretical foundations of acoustical engineering. It is not so much a technical compendium as a systematic statement of physical laws so conceived that technologists might find in it all the information they need to become acquainted with the physical meaning and mathematical expression of phenomena they encounter in their work. To facilitate the acquirement of notions, which lie beyond a layman's grasp, the plan of narration adopted consists in beginning with the simplest idealized cases and then gradually moving on to the truest possible picture of real phenomena. Thus, the first part of the book, dealing with the acoustic field, begins with lossless fluid media, and passes then through perfectly elastic solid media to the real ones, showing losses and relaxations. In the second part, discussing the acoustical systems, the reader is led up from the simplest vibrating system with one degree of freedom to inhomogeneous spatial systems. Classical problems of theoretical acoustics are linked to the questions which appeared still to be the subjects of research. A special chapter has been written to deal with nonlinear acoustics, in consideration of continually growing applications of the acoustic fields of high intensity.
Author : Richard S. C. Cobbold
Publisher : Oxford University Press
ISBN 13 : 9780199775125
Total Pages : 844 pages
Book Rating : 4.7/5 (751 download)
Download or read book Foundations of Biomedical Ultrasound written by Richard S. C. Cobbold and published by Oxford University Press. This book was released on 2006-09-07 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foundations of Biomedical Ultrasound provides a thorough and detailed treatment of the underlying physics and engineering of medical ultrasound practices. It covers the fundamental engineering behind ultrasound equipment, properties of acoustic wave motion, the behavior of waves in various media, non-linear waves and the creation of images. The most comprehensive book on the subject, Foundations of Biomedical Ultrasound is an indispensable reference for any medical professional working with ultrasound imaging, and a comprehensive introduction to the subject for students. The author has been researching and teaching biomedical ultrasonics at the University of Toronto for the past 25 years.
Author : Thomas L. Szabo
Publisher : Elsevier
ISBN 13 : 0080491138
Total Pages : 584 pages
Book Rating : 4.0/5 (84 download)
Download or read book Diagnostic Ultrasound Imaging: Inside Out written by Thomas L. Szabo and published by Elsevier. This book was released on 2004-09-21 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diagnostic Ultrasound Imaging provides a comprehensive introduction to and a state-of-the-art review of the essential science and signal processing principles of diagnostic ultrasound. The progressive organization of the material serves beginners in medical ultrasound science and graduate students as well as design engineers, medical physicists, researchers, clinical collaborators, and the curious. This it the most comprehensive and extensive work available on the core science and workings of advanced digital imaging systems, exploring the subject in a unified, consistent and interrelated manner. From its antecedents to the modern day use and prospects for the future, this it the most up-to-date text on the subject. Diagnostic Ultrasound Imaging provides in-depth overviews on the following major aspects of diagnostic ultrasound: absorption in tissues; acoustical and electrical measurements; beamforming, focusing, and imaging; bioeffects and ultrasound safety; digital imaging systems and terminology; Doppler and Doppler imaging; nonlinear propagation, beams and harmonic imaging; scattering and propagation through realistic tissues; and tissue characterization. Based on the author's over thirty-five years of experience in developing laboratory methodology and standards and conducting research in ultrasound. Conveys the fundamentals of diagnostic ultrasound as well as state-of-the-art reviews of major topics from a historical perspective. Matlab MATLAB problems and examples included. MATLAB problems and examples included
