Study of transmission loss model using the phase of the source

MOE(Measure Of Effectiveness analysis) is needed to predict the sonar detection performance and maneuvering tactics in the ocean. To effect analysis, the detection probability is calculated by sonar characteristics and sound velocity distribution. The detection probability considering the sonar characteristics and the sound velocity distribution can be derived by using the FOM (figure of merit) and the transmission loss. Generally, the transmission loss used to calculate the detection probability is obtained by calculating the path of ray and the attention for the frequency of the source, sound velocity distribution. Although these models have advantages of being efficient and fast, it cannot consider the effect of constructive and destructive interference for the source. In this study, the propagation phenomena for source were calculated by solving the two-dimensional acoustic wave equation to obtain transmission loss. For the computational efficiency, the proposed method uses the geometric spreading correction for the amplitude correction of the three dimensions. The calculated transmission loss is compared with transmission loss using BELLHOP, which is a sound transmission model. As a result, it is confirmed that the proposed method can consider the phase of the source.