When Shinkansen vehicles run in open sections at high-speed, bogie sections emit low-frequency noise and audible noise. For Shinkansen trains to be able to run at higher speeds, it is essential to reduce this aerodynamic noise. To understand the mechanisms generating low-frequency and audible noises, we conducted both field tests and low-noise wind tunnel tests. This paper describes a wind tunnel test method and investigates countermeasures against low-frequency and audible noises.
Akutsu et al. (Fri,) studied this question.