3.1 Introduction3.2 Wave Motion3.3 Plane Sound Waves3.4 Decibels and Levels3.5 Three‐dimensional Wave Equation3.6 Sources of Sound3.7 Sound Power of Sources3.8 Sound Sources Above a Rigid Hard Surface3.9 Directivity3.10 Line Sources3.11 Reflection, Refraction, Scattering, and Diffraction3.12 Ray Acoustics3.13 Energy Acoustics3.14 Near Field, Far Field, Direct Field, and Reverberant Field3.15 Room Equation3.16 Sound Radiation From Idealized Structures3.17 Standing Waves3.18 Waveguides3.19 Other ApproachesReferences