新干线噪声大致可分为车辆下部噪声和车辆上部噪声。前者是由滚动噪声和齿轮噪声构成，后者则是由车辆表面各部产生的空气动力噪声。文中阐述了改进轮轨结构降低滚动噪声的难度、降低空气动力噪声的方针是车辆表面的平滑化，指出车辆结构实际上是空气动力噪声源，还解释了噪声现状和未来推测。 Shinkansen noise can be roughly divided into the lower part of the vehicle noise and vehicle noise. The former is composed of rolling noise and gear noise, while the latter is aerodynamic noise generated by the various parts of the vehicle surface. The paper describes how to improve the wheel-rail structure to reduce the rolling noise. The goal of reducing the aerodynamic noise is to smooth the surface of the vehicle. It is pointed out that the vehicle structure is actually an aerodynamic noise source, and the current noise situation and the future speculation are explained.