Technologies and Applications of Airborne Power Ultrasound in Food Processing

Applications of ultrasonic waves are generally divided into two groups: low intensity and high intensity. Low-intensity applications are those wherein the objective is to obtain information about the propagation medium without producing any modification of its state. On the contrary, high-intensity applications are those wherein ultrasonic energy is used to produce permanent changes in the treated medium. High power ultrasound is devoted to high-intensity applications. The limit between low and high intensities is very difficult to fix, but it can be approximately established for intensity values which, depending on the medium, vary between 0.1 and1W/cm².