04134nam a2200337Ii 4500991003215149707536070806s1997 caua sb 001 0 eng d97801241924540124192459b13649954-39ule_instBibl. Dip.le Aggr. Ingegneria Innovazione - Sez. Ingegneria Innovazioneeng620.222Koopmann, Gary H.505232Designing quiet structures[e-book] :a sound power minimization approach /Gary H. Koopmann & John B. FahnlineQuiet structuresSan Diego :Academic Press,c1997xiii, 244 p. :ill. ;25 cm. +1 computer disk (3 1/2 in.)Includes bibliographical references and indexBasic Equations of Acoustics. Lumped Parameter Model for the Acoustic Radiation Problem. Numerical Solution of the Acoustic Radiation Problem. Experimental Measurement of the Resistance Matrix. Power Output Computations Using the Resistance Matrix. Minimizing Sound Power Using Material Tailoring. Active Control of Radiated Acoustic Power. Characterizing and Controlling the Sound in an Enclosure. Appendix: Input to and Output from the Computer Programs. Chapter ReferencesThis book is the first of its kind. It provides the reader with a logical and highly quantitative means of including noise as a parameter in the early design stages of a machine or structure. The unique and unified methodology builds upon the familiar disciplines of acoustics, structural dynamics and optimization. It also exemplifies the art of simplification - the essence of all good engineering design. = Strategies for designing quiet structures require extensive analytical and experimental tools. For computing the sound power from complex structures the authors recommend a new 3-D, lumped parameter formulation. Not only this, they also include, on diskette, an original numerical program POWER. This fully developed, user-friendly program can be applied generally to noise-control-by-design problems. Detailed instructions for running the application are given in the appendix as well as several sample problems to help the user get started. = The authors also describe a new instrument: a specially developed resistance probe used to measure a structure=92s acoustic surface resistance. As an example, the procedure is outlined for measuring the valve cover of an internal combustion engine. Indeed, throughout the book the reader is presented with actual experiments, numerical and physical that they can replicate in their own laboratory. This is a must-have book for engineers working in industries that include noise control in the design of a product. Its practical and didactic approach also makes it ideally suited to graduate students. Key Features * First text covering the design of quiet structures * Written by two of the leading experts in the world in the area of noise control * Strong in its integration of structural dynamics, acoustics, and optimization theory * Accompanied by a computer program that allows the computation of sound power * Presents numerous applications of noise-control-by-design methods as well as methods for enclosed and open spaces * Each chapter is supported by homework problems and demonstration experimentsElectronic reproduction.Amsterdam :Elsevier Science & Technology,2007.Mode of access: World Wide Web.System requirements: Web browser.Title from title screen (viewed on Aug. 2, 2007).Access may be restricted to users at subscribing institutionsAcoustical engineeringElectronic books.localFahnline, John B.Original01241924599780124192454(OCoLC)38437709Referexhttp://www.sciencedirect.com/science/book/9780124192454An electronic book accessible through the World Wide Web; click for information.b1364995403-03-2224-01-08991003215149707536Designing quiet structures1213453UNISALENTOle02624-01-08m@ -engcau00