The industrial interest in ultrasonic processing has revived during recent years because ultrasonic technology may represent a flexible ‎"‎green alternative for more energy efficient processes‎.‎ A challenge in the application of high‎-intensity ultrasound to industrial processing is the design and development of specific power ultrasonic systems for large scale operation‎.‎ In the area of ultrasonic processing in fluid and multiphase media the development of a new family of power generators with extensive radiating surfaces has significantly contributed to the implementation at industrial scale of several applications in sectors such as the food industry‎,‎ environment‎,‎ and manufacturing‎.‎ Part one covers fundamentals of nonlinear propagation of ultrasonic waves in fluids and solids‎.‎ It also discusses the materials and designs of power ultrasonic transducers and devices‎.‎ Part two looks at applications of high power ultrasound in materials engineering and mechanical engineering‎,‎ food processing technology‎,‎ environmental monitoring and remediation and industrial and chemical processing ‎(‎including pharmaceuticals‎)‎‎,‎ medicine and biotechnology‎.‎ * Covers the fundamentals of nonlinear propagation of ultrasonic waves in fluids and solids‎.‎* Discusses the materials and designs of power ultrasonic transducers and devices‎.‎ * Considers state‎-of‎-the‎-art power sonic applications across a wide range of industries‎.‎