Download or read book Thoughts on Boundary Layer Noise written by Alan Powell and published by . This book was released on 1954 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise Sources in Turbulent Shear Flows Fundamentals and Applications written by Roberto Camussi and published by Springer Science & Business Media. This book was released on 2013-02-11 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: The articles in this volume present the state-of-the-art in noise prediction, modeling and measurement. The articles are partially based on class notes provided during the course `Noise sources in turbulent shear flows', given at CISM on April 2011. The first part contains general concepts of aero acoustics, including vortex sound theory and acoustic analogies, in the second part particular emphasis is put into arguments of interest for engineers and relevant for aircraft design: jet noise, airfoil broadband noise, boundary layer noise (including interior noise and its control) and the concept of noise sources, their theoretical modeling and identification in turbulent lows. All these arguments are treated extensively with the inclusion of many practical examples and references to engineering applications.
Download or read book Entwurf eines Criminal Gesetzbuches f r den Canton Basel written by and published by . This book was released on 1819 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analyses of Jet and Boundary Layer Noise written by O. Bschorr and published by . This book was released on 1968 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanism of Noise Generation in the Turbulent Boundary Layer written by John Laufer and published by . This book was released on 1964 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first chapter briefly states the problem and gives its historical development; the second reviews some basic notions of classical acoustics with special emphasis on the sound field produced by elementary sound sources, while the third one contains the generalized wave equation governing the pressure field radiated by nonuniform nonstationary flow. Subsequent chapters describe the methods proposed by the various authors for finding a solution to the radiation problem. The experimental approach is discussed. (Author).
Download or read book Boundary Layer Noise Research in the U S A and Canada written by E.J. Richards and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Benefits of the Laboratory Simulation of Turbulent Boundary Layer Noise with Loudspeakers written by Alex J. Kremer and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Low Frequency Tones and Turbulent Boundary Layer Noise on Annoyance written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A laboratory study was conducted to examine annoyance to combinations of low-frequency tones and turbulent-boundary-layer noise. A total of 240 sounds, containing tones in the range from 80 to 315 Hz, were rated by 108 test subjects in an anechoic chamber. The results indicated that tone penalties (defines as the failure of a noise metric to account for the presence of pure tones) are highly dependent on the choice of noise metric. A-weighted sound pressure level underpredicted annoyance by as much as the equivalent of 5 db and unweighted sound pressure level overpredicted by as much as the equivalent of db. Tone penalties were observed to be dependent on the shape of the turbulent boundary-layer noise spectrum. Shepherd, K. P. and Leatherwood, J. D. and Clevenson, S. A. Langley Research Center NASA-TP-2202, L-15628, NAS 1.21:2202 RTOP 505-35-13-01...
Download or read book Interaction of Aerodynamic Noise with Laminar Boundary Layers in Supersonic Wind Tunnels written by M. R. Schopper and published by . This book was released on 1984 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Low frequency Tones and Turbulent boundary layer Noise on Annoyance written by Kevin P. Shepherd and published by . This book was released on 1983 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Response to Boundary Layer Noise written by Yung-lo Lin and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Low frequency Tones and Turbulent boundary layer Noise on Annoyance written by Kevin P. Shepherd and published by . This book was released on 1983 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods in Analytical Acoustics written by D.G. Crighton and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 747 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern Methods in Analytical Acoustics considers topics fundamental to the understanding of noise, vibration and fluid mechanisms. The series of lectures on which this material is based began by some twenty five years ago and has been developed and expanded ever since. Acknowledged experts in the field have given this course many times in Europe and the USA. Although the scope of the course has widened considerably, the primary aim of teaching analytical techniques of acoustics alongside specific areas of wave motion and unsteady fluid mechanisms remains. The distinguished authors of this volume are drawn from Departments of Acoustics, Engineering of Applied Mathematics in Berlin, Cambridge and London. Their intention is to reach a wider audience of all those concerned with acoustic analysis than has been able to attend the course.
Download or read book Noise Reduction Analysis written by Uno Ingard and published by Jones & Bartlett Publishers. This book was released on 2009-03-04 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a noted authority in the subject area, this book is a comprehensive study of the theory and practical application of noise reduction to numerous fields. It may be used as a reference by scientists and engineers or in a senior-undergraduate or graduate-level course. The first six chapters deal with the basic mechanisms of sound absorption by which acoustic energy is converted into heat in viscous and thermal boundaries in a sound field. The second part covers duct attenuators with a discussion of how their performance is described and measured. The main part of each chapter is planned to be descriptive, and contains numerical results that should be of direct interest for design work. Mathematical analysis is placed at the end of the chapters.
Download or read book Thoughts on the Problem of Aerodynamic Noise Sources Near Solid Boundaries written by John E. Efowcs Williams and published by . This book was released on 1963 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Report deals with a development of Curle's equations governing sound radiated by surface dipoles, which establishes, directly from those equations, the reflection phenomenon first noted by Powell. The development is for a particular situation, not easily treated by Powell's result, that of a turbulent boundary layer on a rigid flat plate radiating sound to a point so distant that the surface appears small. The development takes such a form that an estimate of the plate size, above which the dipole contribution vanishes and the plate assumes its role of an acoustic reflector, is made possible. The estimate, which is essentially an approximate one, suggests that surfaces have to be very large indeed before they become good reflectors. (Author).
Download or read book Boundary Layer Effects on Wake Noise written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boundary layer Noise and Vibration written by William Richard Graham and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
