In games, spatial audio has been used as a supplementary role to impress users with a specific location or to create a sense of atmosphere.
By incorporating changes in the direction of the sound source due to sound diffraction into the game logic, spatial acoustics can be made not only a supplementary role but also a core element for building game play.

In this study, we verified whether the phenomenon of sound source position change due to the sound going around the wall, which is necessary to construct the above game, can be realized by calculating the diffraction path by path finding.
In addition, to cope with the dynamically changing environment, we implemented a method to reconstruct the pathfinding graph in real time.