축소음향 실험을 위한 고출력 충격 음원

Nowadays rolling stock has become a fast and convenient transportation and increased in its demands. But the improvement of speed has result in increase of aerodynamic noise and therefore residential districts near by the railroad are now constantly suffering from the racket. Thus the study regarding rolling stock’s environmental noise measurement and appraisal has become important. The case of environmental noise, there are no changes of tone so prediction can be made by reducing areas around the railway. This is part of the study which estimates the noise around the railway using scaled model, and the source of the noise has been researched on. The scaled model of rolling stock will have to be able to make high frequency and it needs to be spread out in a short amount of time. In this study, noise source, spark generator, is designed. In the result, spark generator have qualification for noise source to estimate the exterior noise using scaled model. It is judged to be used in the future when predicting the environmental noise of railway vehicles.