抄録
The noise at the lower parts of railway cars consists of rolling noise, aerodynamic noise and mechanical and electrical noise. There are some papers about noise source separation at the lower parts of railway cars. For the purpose of identifying the noise from different sources at the lower parts of railway cars, we visualized the noise distribution which differs under various conditions. This paper describes a trial for noise source separation at the lower parts of railway cars by using the data measured by means of sound intensity microphones and an acoustic mirror with ellipsoidal shape which were set near the rails of a Shinkansen line and a conventional line.
