I think this is one of the best books on Physical Acoustics. I would recommend this book to anyone starting to learn acoustics. This statement does not mean that advanced students should not go for this book, as it also covers advanced materials. My opinion about the book can resumed as follows: - Clear and concise - Relatively easy to follow / Very good for self-studying. - Very good presentation - There is a derivation (or instructions on how to get) to almost every equation in the book. - Not too theoretical. Many practical interpretations of the mathematical results are given. (percentage of mathematics well balanced) - The author makes apparently difficult material simple!
From this book one can jump to more advanced texts (Theoretical Acoustics by Morse and Ingard and Acoustics - An Introduction to its Physical Principles and Applications by Pierce).
Fundamentals of Acoustics by Kinsler et al is also a good book for a beginner, but I think this one is much better.
Moral of the story, I really like this book!
Ps: This is an opinion of a beginner on Physical Acoustics more interested in air applications, that never had lessons about this topic. I don't know if my opinion will change as my knowledge on this field increases. I doubt it!