The shortcomings of the two methods are analyzed.And then a Fast Field Program (FFP) is developed and used to calculate and analyze the underwater acoustic field with the source in the air.

• 接着分析了以上两种方法的缺点，并重点提出了用基于传播矩阵的FFP方法，对空气中声源在水下产生的声场进行了计算和分析，得到了许多有意义的结果。