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Acoustics of Ducts and Mufflers.

Author: M L Munjal
Publisher: Hoboken : Wiley, 2014.
Edition/Format:   eBook : Document : English : 2nd edView all editions and formats
Database:WorldCat
Summary:
Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance Engine 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  Read more...
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Genre/Form: Electronic books
Additional Physical Format: Print version:
Munjal, M.L.
Acoustics of Ducts and Mufflers.
Hoboken : Wiley, ©2014
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: M L Munjal
ISBN: 9781118443088 111844308X
OCLC Number: 870587677
Notes: 3.11.1 Three-Duct Cross-Flow Expansion Chamber Element.
Description: 1 online resource (417 pages)
Contents: 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. 1.7.3 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. 2.10.3 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. 2.18.4 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. 3.3 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.

Abstract:

Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance Engine 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.

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