If you are interested in Marine bioacoustics W.W.L. Au & M.C. Hastings, 2008, "Principles of Marine Bioacoustics", Springer ([link][1]) covers the combined knowledge of Whitlow Au and Mardi Hastings and really replaces the classic reference "Sonar of Dolphins" by Au my own book Zimmer, 2011, Passive acoustic monitoring of cetaceans, Cambridge University Press ([doi][2]) tries to combine hands-on MATLAB code with bio-acoustical basics. [1]: https://link.springer.com/book/10.1007/978-0-387-78365-9 [2]: https://doi.org/10.1017/CBO9780511977107