1. Introduction.
2. Sound Absorption Mechanisms.
3. Sheet Absorbers.
4. Resonators.
5. Rigid Porous Materials.
6. Flexible Porous Materials.
7. Duct Acoustics Overview.
8. Lined Ducts.
9. Reactive Duct Elements.
10. Mathematical Supplements & Comments.
Appendix A. Transmission Matrices.
B. Historical Notes/Absorbers.
C. Historical Notes/Ducts.
Index.