The wide acceptance of Musical Acoustics during the past fourteen years has encouraged the author and the publishers to bring out a new edition of the book. This edition embodies many of the constructive suggestions made by teachers, and by those interested in music, who have made use of the earlier editions. A large part of the text has been more or less completely rewritten, and some rearrangement of the material has been made. At the suggestion of a number of teachers who have used the book as a text, several new features have been added, notably a chapter on basic concepts, and one on simple harmonic motion. Another addition has been the inclusion of a list of questions and problems at the end of many of the chapters. The Bibliography has also been expanded. In the main, the terminology of the American Standards Association has been followed. Except in a few cases where the vector concept is necessarily involved, the term "speed," rather than "velocity," has been used. An effort has been made to incorporate the latest findings of research workers in this field, including certain recent results secured by the author.
The helpful cooperation of those who have used the previous editions is deeply appreciated. The author is particularly indebted to Prof. C. M. Jensen, of Augustana College, who placed at his disposal a list of problems and questions that he has used in his classes in this subject. Many of the problems to be found at the end of the chapters are taken from that list. The cooperation of several manufacturers of acoustical equipment in supplying photographs of new equipment, and of a number of publishers in granting permission to reproduce certain illustrative material, is gratefully . . .