Malcolm J. Crocker, Jorge P. Arenas

Engineering Acoustics (eBook, ePUB)

Noise and Vibration Control

• Format: ePub

Produktbeschreibung

ENGINEERING ACOUSTICS NOISE AND VIBRATION CONTROL A masterful introduction to the theory of acoustics along with methods for the control of noise and vibration In Engineering Acoustics: Noise and Vibration Control, two experts in the field review the fundamentals of acoustics, noise, and vibration. The authors show how this theoretical work can be applied to real-world problems such as the control of noise and vibration in aircraft, automobiles and trucks, machinery, and road and rail vehicles. Engineering Acoustics: Noise and Vibration Control covers a wide range of topics. The sixteen chapters include the following: * Human hearing and individual and community response to noise and vibration * Noise and vibration instrumentation and measurements * Interior and exterior noise of aircraft as well as road and rail vehicles * Methods for the control of noise and vibration in industrial equipment and machinery * Use of theoretical models in absorptive and reactive muffler and silencer designs * Practical applications of finite element, boundary element and statistical energy analysis * Sound intensity theory, measurements, and applications * Noise and vibration control in buildings * How to design air-conditioning systems to minimize noise and vibration Readers, whether students, professional engineers, or community planners, will find numerous worked examples throughout the book, and useful references at the end of each chapter to support supplemental reading on specific topics. There is a detailed index and a glossary of terms in acoustics, noise, and vibration.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 784
• Erscheinungstermin: 31. Dezember 2020
• Englisch
• ISBN-13: 9781118693827
• Artikelnr.: 61441801

Autorenporträt

Malcolm J. Crocker obtained his Bachelors degree in Aeronautical Engineering and Masters degree in Noise and Vibration Studies from Southampton University and his PhD in Acoustics from Liverpool University. He worked at Supermarine and Vickers Armstrong Aircraft, UK, and at Wyle Labs, Huntsville, USA on the Lunar Saturn V launch noise. He has held full professor positions at Purdue, Sydney, and Auburn. At Auburn he served as Mechanical Engineering Department Head and Distinguished University Professor. He has published over 300 papers in refereed journals and conference proceedings and written eight books including the award-winning Encyclopedia of Acoustics, Handbook of Acoustics, and Handbook of Noise and Vibration Control for Wiley. Crocker served as one of the four founding directors of I-INCE and one of the four founding directors of IIAV. He was general chair of INTER-NOISE 72. He served for 40 years as Editor-in-Chief of the Noise Control Engineering Journal and the International Journal of Acoustics and Vibration. He has numerous awards including three honorary doctorates in Russia and Romania and is fellow and/or distinguished fellow of ASA, IIAV and ASME. He received the 2017 ASME Per Bruel Gold Medal for contributions to noise control and acoustics. Jorge P. Arenas, Professor and former director of the Institute of Acoustics, University Austral of Chile, and Fellow of the International Institute of Acoustics and Vibration (IIAV). He received a degree in Acoustical Engineering in 1988 and his MSc in Physics in 1996 both from Univ. Austral, Chile. In 2001, he obtained a PhD in Mechanical Engineering from Auburn University in the USA. He also gained professional experience at the Institute of Acoustics in Madrid, Spain, and at the University of Southampton in the UK. He has served as the President of the IIAV (2016-2018) and he is currently the Editor-in-Chief of the International Journal of Acoustics and Vibration and a member of the editorial board of the journals Shock and Vibration and Applied Acoustics.

Inhaltsangabe

Series Preface xix

Preface xxi

Acknowledgements xxiii

1 Introduction 1

1.1 Introduction 1

1.2 Types of Noise and Vibration Signals 1

1.2.1 Stationary Signals 2

1.2.2 Nonstationary Signals 2

1.3 Frequency Analysis 3

1.3.1 Fourier Series 3

1.3.2 Nonperiodic Functions and the Fourier Spectrum 6

1.3.3 Random Noise 6

1.3.4 Mean Square Values 8

1.3.5 Energy and Power Spectral Densities 9

1.4 Frequency Analysis Using Filters 10

1.5 Fast Fourier Transform Analysis 15

References 17

2 Vibration of Simple and Continuous Systems 19

2.1 Introduction 19

2.2 Simple Harmonic Motion 19

2.2.1 Period, Frequency, and Phase 20

2.2.2 Velocity and Acceleration 21

2.3 Vibrating Systems 23

2.3.1 Mass-Spring System 23

2.4 Multi-Degree of Freedom Systems 30

2.4.1 Free Vibration - Undamped 31

2.4.2 Forced Vibration - Undamped 34

2.4.3 Effect of Damping 36

2.5 Continuous Systems 38

2.5.1 Vibration of Beams 38

2.5.2 Vibration of Thin Plates 41

References 46

3 Sound Generation and Propagation 49

3.1 Introduction 49

3.2 Wave Motion 49

3.3 Plane Sound Waves 50

3.3.1 Sound Pressure 54

3.3.2 Particle Velocity 54

3.3.3 Impedance and Sound Intensity 55

3.3.4 Energy Density 55

3.3.5 Sound Power 56

3.4 Decibels and Levels 56

3.4.1 Sound Pressure Level 56

3.4.2 Sound Power Level 57

3.4.3 Sound Intensity Level 57

3.4.4 Combination of Decibels 58

3.5 Three-dimensional Wave Equation 60

3.6 Sources of Sound 61

3.6.1 Sound Intensity 63

3.7 Sound Power of Sources 63

3.7.1 Sound Power of Idealized Sound Sources 63

3.8 Sound Sources Above a Rigid Hard Surface 67

3.9 Directivity 68

3.9.1 Directivity Factor (Q(theta, Õ)) 70

3.9.2 Directivity Index 71

3.10 Line Sources 71

3.11 Reflection, Refraction, Scattering, and Diffraction 72

3.12 Ray Acoustics 74

3.13 Energy Acoustics 75

3.14 Near Field, Far Field, Direct Field, and Reverberant Field 76

3.14.1 Reverberation 76

3.14.2 Sound Absorption 77

3.14.3 Reverberation Time 78

3.15 Room Equation 80

3.15.1 Critical Distance 81

3.15.2 Noise Reduction 82

3.16 Sound Radiation From Idealized Structures 82

3.17 Standing Waves 85

3.18 Waveguides 91

3.19 Other Approaches 92

3.19.1 Acoustical Lumped Elements 92

3.19.2 Numerical Approaches: Finite Elements and Boundary Elements 92

3.19.3 Acoustic Modeling Using Equivalent Circuits 93

References 93

4 Human Hearing, Speech and Psychoacoustics 95

4.1 Introduction 95

4.2 Construction of Ear and Its Working 95

4.2.1 Construction of the Ear 95

4.2.2 Working of the Ear Mechanism 98

4.2.3 Theories of Hearing 98

4.3 Subjective Response 99

4.3.1 Hearing Envelope 99

4.3.2 Loudness Measurement 99

4.3.3 Masking 103

4.3.4 Pitch 107

4.3.5 Weighted Sound Pressure Levels 108

4.3.6 Critical Bands 111

4.3.7 Frequency (Bark) 112

4.3.8 Zwicker Loudness 113

4.3.9 Loudness Adaptation 115

4.3.10 Empirical Loudness Meter 115

4.4 Hearing Loss and Diseases (D