Classic treatment of wave propagation covers a broad variety of problems with a common mathematical background, from solid state physics to propagation along electric lines, X-rays, rest rays, certain optical reflections, electrical engineering, and wave mechanics of the spinning electron. "Delightfully written." — Max Born. 131 illustrations. 1946 edition.
Here's a sample of other books in this Dover category
Seismic Waves and Sources by Ari Ben-Menahem, Sarva Jit Singh In-depth quantitative assessment of seismic observations covers history of seismology, from first principles to modern developments. Comprehensive, rigorous, lucid account; well illustrated with figures, tables, solved examples. 1981 edition.
Wave Mechanics (Vol. 5 of Pauli Lectures on Physics) by Wolfgang Pauli Focuses on wave functions of force-free particles, description of a particle in a box and in free space, particle in a field of force, multiple particles, eigenvalue problems, more.
Optimal Filtering by Brian D. O. Anderson, John B. Moore Graduate-level text extends studies of signal processing, particularly regarding communication systems and digital filtering theory. Topics include filtering, linear systems, and estimation; discrete-time Kalman filter; time-invariant filters; more. 1979 edition.