抄録
Recently, in railway, it is requested to reduce the rolling noise that has a great part among the trackside noise. Therefore, we have developed a new type of rail noise isolating material for the purpose of reducing the rolling noise. This material is consisted of two laminated layers of ethylene-propylene rubber foam and steel sheet laminated with vibration damping layer, and muffles the whole area of rail web and flange. Characteristics of this material are lightweight, compact and to be easy to install. According to the impact test to evaluate this material's vibration and acoustic characteristic, we confirmed that this material could reduce vibration and generated noise when it was installed to rail. Additionally, by the noise measurement of actual trains along the railway line, we recognized the noise reduction of about 2dB at the neighborhood of rail.
