Here the measurement errors due to acousticfocusing of typical sound sources are analyzed by detailed examples based on the method of image sources in the Ray Theory.
基于射线声学的虚源法，通过具体算例，分析了典型声源声聚焦引起的测量误差。
2
Compared with traditional ultrasonic probe, ultrasonic phased array probe can realize transition, deflection and dynamic focusing of acoustic beam under electronic control.
与传统的超声波探头相比，超声相控阵探头可以实现电子控制下的声束平移、偏转与动态聚焦。
3
The expression for instantaneous pressure near the focusing area was obtained by analyzing the characteristic of focusingacoustic field.