翻译成英语：声压信号分离技术如图3所示。在相隔距离为S的位置X1和X2 处分别齐平式安装两个压力传感器测量压力波动分别为P1xt和P2xt可以在直管段计算得出沿相反方向传播的平面压力波。如图所示管道的左侧为发射平面压力波的理想声源管道的右侧则配备相应的声阻抗ZR。在每个频率处管道内沿相反方向传播的平面压力波的振幅和相位计算公式如下：

The sound pressure signal separation technique is shown in Figure 3. Two pressure sensors are installed in parallel at positions X1 and X2, separated by a distance S. They measure the pressure fluctuations P1(x,t) and P2(x,t) respectively. The plane pressure waves propagating in opposite directions can be calculated along the straight pipe. As shown in the figure, the left side of the pipe is an ideal sound source for emitting plane pressure waves, while the right side of the pipe is equipped with the corresponding acoustic impedance ZR. The amplitude and phase calculation formulas for the plane pressure waves propagating in opposite directions inside the pipe are as follows at each frequency