Foundations of Engineering Acoustics

by Frank J. Fahy

Overview

Foundations of Engineering Acoustics takes the reader on a journey from a qualitative introduction to the physical nature of sound, explained in terms of common experience, to mathematical models and analytical results which underlie the techniques applied by the engineering industry to improve the acoustic performance of their products. The book is distinguished by extensive descriptions and explanations of audio-frequency acoustic phenomena and their relevance to engineering, supported by a wealth of diagrams, and by a guide for teachers of tried and tested class demonstrations and laboratory-based experiments. Foundations of Engineering Acoustics is a textbook suitable for both senior undergraduate and postgraduate courses in mechanical, aerospace, marine, and possibly electrical and civil engineering schools at universities. It will be a valuable reference for academic teachers and researchers and will also assist Industrial Acoustic Group staff and Consultants. - Comprehensive and up-to-date: broad coverage, many illustrations, questions, elaborated answers, references and a bibliography - Introductory chapter on the importance of sound in technology and the role of the engineering acoustician - Deals with the fundamental concepts, principles, theories and forms of mathematical representation, rather than methodology - Frequent reference to practical applications and contemporary technology - Emphasizes qualitative, physical introductions to each principal as an entrée to mathematical analysis for the less theoretically oriented readers and courses - Provides a 'cook book' of demonstrations and laboratory-based experiments for teachers - Useful for discussing acoustical problems with non-expert clients/managers because the descriptive sections are couched in largely non-technical language and any jargon is explained - Draws on the vast pedagogic experience of the writer

Product Details

ISBN-13:	9780080506838
Publisher:	Elsevier Science & Technology Books
Publication date:	09/12/2000
Sold by:	Barnes & Noble
Format:	eBook
Pages:	443
File size:	17 MB
Note:	This product may take a few minutes to download.

About the Author

Frank Fahy has been teaching and researching at the Institute of Sound and Vibration Research, Southampton, England, for nearly forty years. He is Emeritus Professor of Engineering Acoustics, signifying both his training and professionalmotivation. He is a Rayleigh Medal holder and Honorary Fellow of the Institute of Acoustics.

Table of Contents

PrefaceAcknowledgmentsChapter 1 Sound Engineering 1.1 The Importance of Sound 1.2 Acoustics and the Engineer 1.3 Sound the ServantChapter 2 The Nature of Sound and Some Sound Wave Phenomena 2.1 Introduction 2.2 What Is Sound? 2.3 Sound and Vibration 2.4 Sound in Solids 2.5 a Qualitative Introduction to Wave Phenomena 2.5.1 Wavefronts 2.5.2 Interference 2.5.3 Reflection 2.5.4 Scattering 2.5.5 Diffraction 2.5.6 Refraction 2.5.7 The Doppler Effect 2.5.8 Convection 2.6 Some More Common Examples of the Behavior of Sound WavesChapter 3 Sound in Fluids 3.1 Introduction 3.2 The Physical Characteristics of Fluids 3.3 Molecules and Particles 3.4 Fluid Pressure 3.5 Fluid Temperature 3.6 Pressure, Density and Temperature in Sound Waves in a Gas 3.7 Particle Motion 3.8 Sound in Liquids 3.9 Mathematical Models of Sound Waves 3.9.1 The Plane Sound Wave Equation 3.9.2 Solutions of the Plane Wave Equation 3.9.3 Harmonic Plane Waves: Sound Pressure 3.9.4 Plane Waves: Particle Velocity 3.9.5 The Wave Equation in Three Dimensions 3.9.6 Plane Waves in Three Dimensions 3.9.7 The Wave Equation in Spherical Coordinates 3.9.8 The Spherically Symmetric Sound Field 3.9.9 Particle Velocity in the Spherically Symmetric Sound Field 3.9.10 Other Forms of Sound FieldChapter 4 Impedance 4.1 Introduction 4.2 Some Simple Examples of the Utility of Impedance 4.3 Mechanical Impedance 4.3.1 Impedance of Lumped Structural Elements 4.4 Forms of Acoustic Impedance 4.4.1 Impedances of Lumped Acoustic Elements 4.4.2 Specific Acoustic Impedance of Fluid in a Tube at Low Frequency 4.4.3 Normal Specific Acoustic Impedance 4.4.4 Radiation Impedance 4.4.5 Acoustic Impedance 4.4.6 Line and Surface Wave Impedance 4.4.7 Modal Radiation Impedance 4.5 an Application of Radiation Impedance of a Uniformly Pulsating Sphere 4.6 Radiation EfficiencyChapter 5 Sound Energy and Intensity 5.1 The Practical Importance of Sound Energy 5.2 Sound Energy 5.3 Transport of Sound Energy: Sound Intensity 5.4 Sound Intensity in Plane Wave Fields 5.5 Intensity and Mean Square Pressure 5.6 Examples of Ideal Sound Intensity Fields 5.6.1 The Point Monopole 5.6.2 The Compact Dipole 5.6.3 Interfering Monopoles 5.6.4 Intensity Distributions in Orthogonally Directed Harmonic Plane Wave Fields 5.7 Sound Intensity Measurement 5.8 Determination of Source Sound Power Using Sound Intensity Measurement 5.9 Other Applications of Sound Intensity MeasurementChapter 6 Sources of Sound 6.1 Introduction 6.2 Qualitative Categorization of Sources 6.2.1 Category 1 Sources 6.2.2 Category 2 Sources 6.2.3 Category 3 Sources 6.3 The Inhomogeneous Wave Equation 6.3.1 Sound Radiation by Foreign Bodies 6.3.2 Boundary 'Sources' Can Reflect or Absorb Energy 6.4 Ideal Elementary Source Models 6.4.1 The Dirac Delta Function 6.4.2 The Point Monopole and the Pulsating Sphere 6.4.3 Acoustic Reciprocity 6.4.4 External Forces on a Fluid and the Compact Dipole 6.4.5 The Oscillating Sphere 6.4.6 Boundary Sources 6.4.7 Free-Field and Other Green's Functions 6.4.8 The Rayleigh Integrals 6.5 Sound Radiation from Vibrating Plane Surfaces 6.6 The Vibrating Circular Piston and the Cone Loudspeaker 6.7 Directivity and Sound Power of Distributed Sources 6.7.1 Sound Power of a Source in the Presence of a Second Source 6.8 Zones of a Sound Field Radiated by a Spatially Extended Source 6.9 Experimental Methods for Source Sound Power Determination 6.

Editorial Reviews

...a masterpiece of thoroughness, organization, and clarity...sure to become a classic in acoustical literature and should be on the shelves of every acoustics library.

Jorge P. Arenas

Fahy (engineering acoustics, Institute of Sound and Vibration Research, Southampton, England) presents this textbook covering the concepts, principles, physical phenomena, theoretical models and mathematical representations which form the foundations for engineering acoustics. The text is intended for students in senior undergraduate and postgraduate courses in mechanical, aerospace, marine, electrical and civil engineering, who have not taken a previous course in acoustics. It requires an ability to handle complex numbers, basic differential and integral calculus, and second- order differential equations with constant coefficients. Annotation c. Book News, Inc., Portland, OR (booknews.com)

...a masterpiece of thoroughness, organization, and clarity...sure to become a classic in acoustical literature and should be on the shelves of every acoustics library.” —Jorge P. Arenas, Auburn University, International Journal of Acoustics and Vibration, Vol. 6, No. 1, 2001

“essentially a text book aimed at senior undergraduate, and post graduate engineering students, and their tutors ... However, the scope and format are also suitable for professional engineers with no formal training in acoustics...Foundations of Engineering Acoustics does great service to the field of acoustics by providing an appropriate introduction to the practical implications of noise and vibration in engineering and everyday life in general.” —Donald Quinn, Institute of Acoustics Bulletin

“...there are very few textbooks that present Engineering Acoustics at a fairly basic, though higher than elementary, level. Professor Fahy's book therefore meets a need on the part of many engineers who may lack a formal background in acoustics but nonetheless are faced with acquiring some knowledge of the subject...Questions are occasionally interposed in the text, and these should help to stimulate the thought processes of the reader. The occasional flashes of humor are welcome...One feels that Professor Fahy has succeeded in his purpose,"...to assist readers to acquire an understanding of those concepts and principles, physical phenomena, theoretical models and mathematical representations that form the foundations of the practice of engineering acoustics"...the reader who carefully reads and works his way through this text will acquire a very good understanding of the physics involved in a wide range of engineering acoustics and vibration applications, as well as the mathematical basis for tackling more advanced problems...Overall, Frank Fahy has written a book that is up to the standard of erudition, authoritativeness and pedagogical excellence that we have come to expect from him on the basis of his other publications.” —Applied Acoustics, Vol. 66, Issue 1, January 2005

“I found that this book serves its purpose as a comprehensive introduction to acoustics for the upper level engineering student. I can also recommend the text as a refresher for the practicing engineer.” —Stephen M. Jaeger, Colin Gordon & Associates, San Bruno, CA, USA

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