抄録
It is well known that major aeroacoustic sources remaining for Shinkansen are pantographs, bogies and gaps between cars. At the same time, these sound sources might include low-frequency noise, which is difficult to insulate with noise barrier. In this paper, an experimental facility that can launch a train model at high velocities is used to investigate sources of the low-frequency aeroacoustic sound. The comparative study of flat, bogie cavities and gaps between cars using 1/33.1 scale train model shows that bogie cavities generate low-frequency aeroacoustic sound in the range of 10 to 60 Hz, and side covers equipped with series E5 effectively reduce that sound.
