功率超声是利用超声振动形式的能量使物质的一些物理、化学和生物特性或状态发生改变,或使这种改变的过程加速的一门科学技术。与检测超声不同,功率超声是利用超声能量来对物质进行处理、加工,最常用的频率范围,是从几千赫到几十千赫,功率范围由几瓦到几万瓦。声能对物质的作用机制是功率超声较为独特的问题,也是一个比较复杂的问题,为此必须了解和究各种应用中的作用机理。 Power ultrasound is a science that uses the energy of ultrasonic vibration to change or accelerate some of the physical, chemical, and biological properties or states of matter. Unlike ultrasonic testing, ultrasonic power is the use of ultrasonic energy to treat and process materials. The most commonly used frequency range is from a few kilohertz to tens of kilohertz, and power ranges from a few watts to tens of kilowatts. The mechanism of action of sound energy on matter is a more unique issue of power ultrasound and also a more complicated issue. Therefore, it is necessary to understand and study the mechanism of action in various applications.