Phased array can control the beam electronically to form predicted focus patterns, not only form multiple-focus simultaneously, but also control the beam synthesis avoiding the obstacles.

• 而相控阵换能器则可以实现电子聚焦，灵活地控制声束聚焦，不仅可以同时形成多个焦点，增大焦域体积，还可以控制声束避开遮挡物进行合成。