本程序基于射线声学bellhop工具包，用于计算不同环境条件下声场的传播损失。(The program is based on the bellhop toolkit of ray acoustics and is used to calculate the propagation loss of sound field under different environmental conditions.)

介绍了如何进行声场分析，如何利用边界元。有限元方法进行声压求解。(it introduces how to analyze the sound field and how to use the boundary element method. The sound pressure is solved by finite element method.)