Duct Acoustics: Fundamentals and Applications to Mufflers and Silencers

Erkan Dokumacı

doi:10.1017/9781108887656

foundations of duct acoustics to the acoustic design of duct systems, through practical modeling, optimization and measurement techniques. Discover in-depth analyses of one- and three-dimensional models of sound generation, propagation and radiation, as techniques for assembling acoustic models of duct systems from simpler components are described. Identify the weaknesses of mathematical models in use and improve them by measurement when needed. Cope with challenges in acoustic design, and improve understanding of the underlying physics, by using the tools described. An essential reference for engineers and researchers who work on the acoustics of fluid machinery ductworks.

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Contents

Duct Acoustics
pp i-ii
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Duct Acoustics - Title page
pp iii-iii
Fundamentals and Applications to Mufflers and Silencers
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Copyright page
pp iv-iv
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Dedication
pp v-vi
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Contents
pp vii-xvi
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Preface
pp xvii-xx
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1 - Some Preliminaries
pp 1-22
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2 - Introduction to Acoustic Block Diagrams
pp 23-58
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3 - Transmission of Low-Frequency Sound Waves in Ducts
pp 59-124
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4 - Transmission of One-Dimensional Waves in Coupled Ducts
pp 125-172
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5 - Resonators, Expansion Chambers and Silencers
pp 173-237
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6 - Multi-Modal Sound Propagation in Ducts
pp 238-325
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7 - Transmission of Wave Modes in Coupled Ducts
pp 326-368
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8 - Effects of Viscosity and Thermal Conductivity
pp 369-398
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9 - Reflection and Radiation at Open Duct Terminations
pp 399-437
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10 - Modeling of Ducted Acoustic Sources
pp 438-473
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11 - Radiated Sound Pressure Prediction
pp 474-500
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12 - Measurement Methods
pp 501-532
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13 - System Search and Optimization
pp 533-551
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Appendices
pp 552-578
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Appendix A - Basic Equations of Fluid Motion
pp 552-560
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Appendix B - Acoustic Properties of Rigid-Frame Fibrous Materials
pp 561-566
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Appendix C - Impedance of Compact Apertures
pp 567-578
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Index
pp 579-586
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Duct Acoustics

Fundamentals and Applications to Mufflers and Silencers

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Contents

Duct Acoustics
pp i-ii

Duct Acoustics - Title page
pp iii-iii

Copyright page
pp iv-iv

Dedication
pp v-vi

Contents
pp vii-xvi

Preface
pp xvii-xx

1 - Some Preliminaries
pp 1-22

2 - Introduction to Acoustic Block Diagrams
pp 23-58

3 - Transmission of Low-Frequency Sound Waves in Ducts
pp 59-124

4 - Transmission of One-Dimensional Waves in Coupled Ducts
pp 125-172

5 - Resonators, Expansion Chambers and Silencers
pp 173-237

6 - Multi-Modal Sound Propagation in Ducts
pp 238-325

7 - Transmission of Wave Modes in Coupled Ducts
pp 326-368

8 - Effects of Viscosity and Thermal Conductivity
pp 369-398

9 - Reflection and Radiation at Open Duct Terminations
pp 399-437

10 - Modeling of Ducted Acoustic Sources
pp 438-473

11 - Radiated Sound Pressure Prediction
pp 474-500

12 - Measurement Methods
pp 501-532

13 - System Search and Optimization
pp 533-551

Appendices
pp 552-578

Appendix A - Basic Equations of Fluid Motion
pp 552-560

Appendix B - Acoustic Properties of Rigid-Frame Fibrous Materials
pp 561-566

Appendix C - Impedance of Compact Apertures
pp 567-578

Index
pp 579-586

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Duct Acoustics

Fundamentals and Applications to Mufflers and Silencers

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