鉄道の曲線部における騒音に関する検討

（1次元マイクロホンアレイを用いた検討）

抄録

Curve squeal noise is one of the major sources of railway noise which needs to be reduced because of strong public opinion. In order to understand the mechanisms underlying the generation of squeal noise and develop methods to reduce this noise, the measurement field test was conducted in a commercial line. By using linear microphone arrays installed on both sides of the railway track, the noise radiated from each wheel at each position on the track was calculated. Analysis of the measurement results showed that the main source of curve squeal noise does not travel and radiates almost the same at any position. In addition, the source of noise traveling with the train did not increase or decrease at any particular location on the track.