[pdf] Acoustics: Basic Physics, Theory, and Methods Paul Filippi, Aime Bergassoli, Dominique Habault, Jean Pierre Lefebvre

The author gives a heavily mathematical treatment that covers all the traditional topics within acoustics. Much of the treatment can be found in texts going back decades. Like the discussion on point sources and solving the Helmholtz equation, when we have simple sources in free space. Then there are the Green’s functions approach to solving various acoustic equations.

What is more recent is the coverage of computational techniques. As computers have gained in power, you can avail yourself of increasingly more effective tools, using some of the chapters in this book.