Compared of different contributions of the tread vibration and the web vibration on sound level of railwaynoise.
对比分析不同激振情况下，踏面径向振动与辐板轴向振动对噪声声压级的贡献比例。
2
The domestic and international railwaynoise predicted models has been analyzed and find out main environment factors affecting noise.
本文通过对国内外铁路噪声预测模式比较分析，找出影响铁路噪声分布的主要影响因子。
3
This article introduces the efforts made by some of British, American and Japanese scientists to reduce airplane noise, railwaynoise and air conditioning noise.