Describes the principles and applications of ultrasound as a source of energy for the acceleration or modification of chemical reactivity. The authors begin with a review of the relevant acoustic wave theory, and identify the mechanisms behind homogeneous reactions and reactions involving metal surfaces and powders. Following are chapters on harnessing cavitational effects for the destruction of biological and chemical pollutants in water and soil, the effects of low frequency high intensity ultrasonic waves on polymers, and electroplating in the presence of ultrasound. A comparison of ultrasonic apparatus rounds out the book.