This open access textbook, like Rayleigh\'s classic Theory of Sound , focuses on experiments and on approximation techniques rather than mathematical rigor.
For example, phasor notation has been added to clearly distinguish complex variables, and there is a new section on radiation from an unbaffled piston..
The second edition has benefited from comments and corrections provided by many acousticians, in particular those who have used the first edition in undergraduate and graduate courses.
This open access textbook, like Rayleigh\'s classic Theory of Sound , focuses on experiments and on approximation techniques rather than mathematical rigor