**ERRATA**

Basic Fluid Mechanics and Thermodynamics 1.1 Indicial Notation

1.2 Continuum Model

1.3 Macroscopic Thermodynamics

1.4 Conservation of Mass 1.5 Equation of Motion

1.6 The Energy Equation

1.7 Complete System of Equations

Basic Properties of Acoustic Waves 2.1 Ideal Fluids

2.2 Linearization

2.3 Uniform Fluids

2.4 One-Dimensional Plane Waves

2.5 Monochromatic Waves

2.6 Fourier Analysis

2.7 Acoustic Energy

Refliction and Transmission Phenomena 3.1 Normal Incidence

3.2 Characteristic Waves

3.3 Transmission Through A Wall

3.4 Oblique Incidence

3.5 Propagation In A Two-Dimensional Channel

3.6 Acoustic Field In A Piston-Driven Tube

Experimental Determination of

3.7 Some Nonlinear Effects

3.8 Plane Waves In Tubes Of Varying Cross Section

3.9 Sudden Area Changes

3.10 Tube With Temperature Gradient

Spherical And Cylindrical Waves 4.1 Centrally Symmetric Waves

4.2 Problems With Spherical Symmetry

4.3 Axially Symmetric Spherical Waves

4.4 Circularly Cylindrical Waves

4.5 Nonmonochromatic Cylindrical Waves

Sound Emission 5.1 Radiation From a Pulsating Sphere

5.2 Inhomogeneous Wave Equation

5.3 Emission From A Piston In An Infinite Wall

5.4 Compact Distributions of Sources

5.5 Oscillating Sphere

5.6 Radiation From Fluctuating Forces

5.7 Acoustic Dipoles

5.8 Far-Field Of Compact Force Distribution

5.9 Acoustic Quadrupoles

5.10 Sound Emission By Heat Release

5.11 Integral Formulation For Radiation

Sound Absorption 6.1 Linearized Dissipative Equations

6.2 Attenuation Due To Viscous Effects

6.3 Attenuation In Viscous, Heat-Conducting Fluid

6.4 Energy-Dissipation Method

6.5 Effects of Boundaries

6.6 Attenuation In Tubes

6.7 Boundary Effects: Vector Formulation

6.8 Propagation In A Two-Dimensional Channel

6.9 Sphere Oscillating In Viscous Fluid

6.10 Sphere In A Sound Wave

6.11 Attenuation And Dispersion IN A Dilute Suspension

6.12 Boundary Viscous And Thermal Effects

6.13 Waves Emitted By Plane Heater

B. Explicit Expressions For Some Vector And Tensor Quantities In Special Coordinate Systems

C. Some Properties Of The Bessel Functions

D. Some Properties Of The Spherical Bessel Functions

E. Legendre Polynomials AUTHOR INDEX SUBJECT INDEX

This book is an outgrowth of a course in acoustics I have taught for a number of years at Rutgers University. The main reason for adding one more book to an already long list of books on this subject is the lack of modern introductory texts that treat acoustics as a branch of fluid mechanics. In my view, this is the most natural approach, at least for those areas of acoustics dealing with the most common media for sound propagation, namely, air and water. This approach is, of course, not new. It was used by the authors of many of the books now considered classical, including Rayleigh, Lamb, and others. In recent times, however, many of the acoustics texts that have appeared treat the subject as a branch of electrical engineering. There are indeed many instances in which acoustic oscillations are analogous to some phenomena discussed in electrical engineering courses and the analogies are clearly advantageous to those students whose background is in that discipline. For others, the analogies may be a drawback; to them, both the acoustic equations and their electrical analogues are new.

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