Parameters of acoustics presented in a logical and lucid stylePhysical principles discussed with mathematical formulationsImportance of ultrasonic waves highlightedDispersion of ultrasonic waves in viscous liquids explainedABOUT THE BOOK:This book presents the theory of waves and oscillations and various applications of acoustics in a logical and simple form. The physical principles have been explained wherever possible. Incorporating the classical view point all aspects of acoustic waves and oscillations have been discussed together with detailed elaboration of modern technological applications of sound. A separate chapter on ultrasonics emphasizes the importance of this branch of science in fundamental and applied research. In this edition a new chapter "Hypersonic Velocity in Viscous Liquids as revealed from Brillouin Spectra" has been added. The book is expected to present to its readers a comprehensive presentation of the subject matter and at the same time to guide him for independent thinking on some new lines of investigation.