LEADER 07463nam 2200721 450 001 9910463853303321 005 20200520144314.0 010 $a1-118-44309-8 010 $a1-118-44308-X 035 $a(CKB)2670000000523118 035 $a(EBL)1629336 035 $a(SSID)ssj0001111259 035 $a(PQKBManifestationID)11701287 035 $a(PQKBTitleCode)TC0001111259 035 $a(PQKBWorkID)11129127 035 $a(PQKB)10744561 035 $a(MiAaPQ)EBC1629336 035 $a(DLC) 2013046290 035 $a(Au-PeEL)EBL1629336 035 $a(CaPaEBR)ebr10837608 035 $a(CaONFJC)MIL574145 035 $a(OCoLC)870587677 035 $a(EXLCZ)992670000000523118 100 $a20131118d2014 uy| 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aAcoustics of ducts and mufflers /$fM.L. Munjal 205 $aSecond edition. 210 1$aChichester, West Sussex, United Kingdom :$cJohn Wiley & Sons, Inc.,$d2014. 215 $a1 online resource (417 p.) 300 $aRevised edition of: Acoustics of ducts and mufflers with application to exhaust and ventilation system design / M.L. Munjal. 1987. 311 $a1-118-44310-1 311 $a1-118-44312-8 320 $aIncludes bibliographical references and index. 327 $aContents; Preface; 1. Propagation of Waves in Ducts; 1.1 Plane Waves in an Inviscid Stationary Medium; 1.2 Three-Dimensional Waves in an Inviscid Stationary Medium; 1.2.1 Rectangular Ducts; 1.2.2 Circular Ducts; 1.3 Waves in a Viscous Stationary Medium; 1.4 Plane Waves in an Inviscid Moving Medium; 1.5 Three-Dimensional Waves in an Inviscid Moving Medium; 1.6 One-Dimensional Waves in a Viscous Moving Medium; 1.7 Waves in Ducts with Compliant Walls (Dissipative Ducts); 1.7.1 Rectangular Duct with Locally Reacting Lining; 1.7.2 Circular Duct with Locally Reacting Lining 327 $a1.7.3 Rectangular Duct with Bulk Reacting Lining1.7.4 Circular Duct with Bulk Reacting Lining; 1.8 Three-Dimensional Waves along Elliptical Ducts; References; 2. Theory of Acoustic Filters; 2.1 Units for the Measurement of Sound; 2.2 Uniform Tube; 2.3 Radiation Impedance; 2.4 Reflection Coefficient at an Open End; 2.5 A Lumped Inertance; 2.6 A Lumped Compliance; 2.7 End Correction; 2.8 Electroacoustic Analogies; 2.9 Electrical Circuit Representation of an Acoustic System; 2.10 Acoustical Filter Performance Parameters; 2.10.1 Insertion Loss, IL; 2.10.2 Transmission Loss, TL 327 $a2.10.3 Level Difference, LD2.10.4 Comparison of the Three Performance Parameters; 2.11 Lumped-Element Representations of a Tube; 2.12 Simple Area Discontinuities; 2.13 Gradual Area Changes; 2.13.1 Conical Tube; 2.13.2 Exponential Tube; 2.13.3 Elliptical Tube; 2.14 Extended-Tube Resonators; 2.15 Helmholtz Resonator; 2.16 Concentric Hole-Cavity Resonator; 2.17 An Illustration of the Classical Method of Filter Evaluation; 2.18 The Transfer Matrix Method; 2.18.1 De.nition of Transfer Matrix; 2.18.2 Transfer Matrix of a Uniform Tube; 2.18.3 A General Method for Derivation of Transfer Matrix 327 $a2.18.4 Transfer Matrices of Lumped Elements2.18.5 Transfer Matrices of Variable Area Tubes; 2.18.6 Overall Transfer Matrix of the System; 2.18.7 Evaluation of TL in Terms of the Four-Pole Parameters; 2.19 TL of a Simple Expansion Chamber Muffler; 2.20 An Algebraic Algorithm for Tubular Mufflers; 2.20.1 Development of the Algorithm; 2.20.2 Formal Enunciation and Illustration of the Algorithm; 2.21 Synthesis Criteria for Low-Pass Acoustic Filters; References; 3. Flow-Acoustic Analysis of Cascaded-Element Mufflers; 3.1 The Exhaust Process; 3.2 Finite Amplitude Wave Effects 327 $a3.3 Mean Flow and Acoustic Energy Flux3.4 Aeroacoustic State Variables; 3.5 Aeroacoustic Radiation; 3.6 Insertion Loss; 3.7 Transfer Matrices for Tubular Elements; 3.7.1 Uniform Tube; 3.7.2 Extended-Tube Elements; 3.7.3 Simple Area Discontinuities; 3.7.4 Physical Behavior of Area Discontinuities; 3.8 Perforated Elements with Two Interacting Ducts; 3.8.1 Concentric-Tube Resonator; 3.8.2 Cross-Flow Expansion Element; 3.8.3 Cross-Flow Contraction Element; 3.8.4 Some Remarks; 3.9 Acoustic Impedance of Perforates; 3.10 Matrizant Approach; 3.11 Perforated Elements with Three Interacting Ducts 327 $a3.11.1 Three-Duct Cross-Flow Expansion Chamber Element 330 $a"Fully updated second edition of the premier reference book on muffler and lined duct acoustical performanceEngine exhaust noise pollutes the street environment and ventilation fan noise enters dwellings along with fresh air. People have become conscious of their working environment. Governments of most countries have responded to popular demand with mandatory restrictions on sound emitted by automotive engines, and a thorough knowledge of acoustics of ducts and mufflers is needed for the design of efficient muffler configurations. This fully updated Second Edition of Acoustics of Ducts and Mufflers deals with propagation, reflection and dissipation/absorption of sound along ducts/pipes/tubes, area discontinuities, perforated elements and absorptive linings that constitute the present-day mufflers and silencers designed to control noise of exhaust and intake systems of automotive engines, diesel-generator sets, compressors and HVAC systems.It includes equations, figures, tables, references, and solved examples and unsolved exercises with answers, so it can be used as a text book as well as a reference book. It also offers a complete presentation and analysis of the major topics in sound suppression and noise control for the analysis and design of acoustical mufflers, air conditioning and ventilation duct work. Both the fundamentals and the latest technology are discussed, with an emphasis on applications. Deals with reactive mufflers, dissipative silencers, the frequency-domain approach, and the time-domain approach. Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance, in one complete volume Presents original new research on topics including baffle silencers and louvers, 3D analytical techniques, and flow-acoustic analysis of multiply-connected perforated-element mufflers Includes a general design procedure to help muffler designers in the automotive industry, exhaust noise being a major component of automobile and traffic noise pollution Written by an expert with four decades' experience in teaching to graduate students, publishing extensively in reputed international journals, and consulting with industry for noise control as well as designing for quietness "--$cProvided by publisher. 606 $aAir ducts$xAcoustic properties 606 $aAutomobiles$xMotors$xMufflers$xAcoustic properties 606 $aVentilation$xNoise 606 $aAutomobiles$xMotors$xExhaust systems$xNoise 608 $aElectronic books. 615 0$aAir ducts$xAcoustic properties. 615 0$aAutomobiles$xMotors$xMufflers$xAcoustic properties. 615 0$aVentilation$xNoise. 615 0$aAutomobiles$xMotors$xExhaust systems$xNoise. 676 $a629.25/2 686 $aTEC006000$2bisacsh 700 $aMunjal$b M. L$g(Manchar Lal),$f1945-$0283085 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910463853303321 996 $aAcoustics of ducts and mufflers$9668794 997 $aUNINA