The radiated sound field generated by a moving sound source is analyzed. Numerical analysis has been shown to be feasible for a radiated sound field of a moving source assuming a point source. Consideration should be given when the observation point is in the vicinity of the sound source. Numerical analysis for the case where the observation point is in the vicinity of a moving sound source and the size of the moving object including the sound source is not negligible has not yet been confirmed. The application of the immersed boundary method, which enables the handling of arbitrarily shaped objects, to the modeling of sound sources has been proposed in the field of fluid engineering. This study investigates the possibility of numerical simulation of sound field characteristics generated by moving sound sources. In this paper, we simulate the radiated sound field generated by a moving sound source by applying the immersed boundary method and investigate the validity of the simulation. As a result, under the present conditions, the trends in amplitude variation at the observation points and in the average value of the gradient of the sound pressure change generally matched the theoretical values and the simulation results, but the trends in the source velocity change and the average value of the gradient of the sound pressure change did not match. For frequency modulation, it is possible to simulate results equivalent to theoretical values.
EJIRI et al. (Wed,) studied this question.