滚道声是由于NTN轴承旋转时滚动体在滚道中滚动而激发出一种平稳且连续性的噪声，只有当其声压级或声调极大时才引起人们注意。
Raceway sound is a steady and continuous noise produced by rolling the rollers in the raceway when the NTN bearings rotate. It is noticed only when the sound pressure level or tone is very high.
其实滚道声所激发的声能是有限的，如在正常情况下，优质的6203NTN轴承滚道声为25——27dB。这种噪声以承受径向载荷的单列深沟球NTN轴承为典型，它有以下特点：
In fact, the sound energy excited by raceway sound is limited, such as in normal circumstances, high-quality 6203 NTN bearing raceway sound is 25-27 dB. This noise is the most typical type of NTN bearing with single row deep groove ball bearing radial load. It has the following characteristics:
a.噪声、振动具有随机性；
A. noise and vibration are random.
b.振动频率在1kHz以上；
B.The vibration frequency is above 1kHz.
c.不论转速如何变化，噪声主频率几乎不变而声压级则随转速增加而提高；
C. No matter how the speed changes, the main frequency of the noise is almost constant while the sound pressure level increases with the increase of speed.
d.当径向游隙增大时，声压级急剧增加；
D. when the radial clearance increases, the sound pressure level increases sharply.
e.NTN轴承座刚性增大，总声压级越低，即使转速升高，其总声压级也增加不大；
E.When the rigidity of the NTN bearing seat increases, the total sound pressure level decreases, and even if the rotational speed increases, the total sound pressure level increases slightly.
f.润滑剂粘度越高，声压级越低，但对于脂润滑，其粘度、皂纤维的形状大小均能影响噪声值。
F. The higher the viscosity of lubricant, the lower the sound pressure level, but for grease lubrication, its viscosity, the shape and size of soap fiber can affect the noise value.
滚动声产生在于受到载荷后的套圈固有振动所致。由于套圈和滚动体的弹性接触构成非线性振动系统。当润滑或加工精度不高时就会激发与此弹性特征有关的固有振动，传递到空气中则变为噪声。众所周知，即使是采用了当代高超的制造技术加工NTN轴承零件，其工作表面总会存在程度不一的微小几何误差，从而使滚道与滚动体间产生微小波动激发振动系统固有振动。
The rolling sound is generated by the natural vibration of the ring after loading. As the elastic contact between the ring and the rolling element forms a nonlinear vibration system. When the lubrication or machining accuracy is not high, it will excite the inherent vibration related to the elastic characteristics, which will become noise when transmitted to the air. It is well known that even if the NTN bearing parts are manufactured by the most advanced manufacturing technology, there will always be small geometric errors in varying degrees on the working surface, which will cause small fluctuations between the raceway and the rolling element to excite the natural vibration of the vibration system.
尽管NTN轴承的滚道噪声是不可避免的，然而在采取高精度加工零件工作表面，正确选用NTN轴承及精确使用NTN轴承使之降噪减振。
Although the raceway noise of NTN bearings is unavoidable, the correct selection of NTN bearings and the precise use of NTN bearings can reduce noise and vibration when high precision machining Parts'working surface is adopted.