Originally published in 1922, as the second edition of a title first published in 1913, this book was created to provide students of physics, and to a lesser extent music, with an introduction to the properties of sound. The text is structured in such a way as to increase accessibility for different readers. Complicated mathematical explication is avoided where possible and sections requiring a higher standard of knowledge are marked with an asterisk. Questions and answers relating to each chapter and an authorial preface are also provided. This book will be of value to anyone with an interest in the physical properties of sound and pedagogical approaches to physics.