Ultrasonic transducer is the part of producing ultrasound and supersonic power offers energy to the transducers. 超声波换能器是产生超声场的部件，超声波电源用以驱动超声波换能器，向其提供能量，使之产生超声场。
The resulting ultrasonic sound wave can then be directed out in a tightly controlled beam. 由此超声音波可以用严格控制声音的方向。
