Traffic noise has become a severe environmental problem with ever more people feeling affected by and complaining about it. To help achieve objective and subjective perceived noise load reductions, methods to analyze the sound field caused by traffic are therefore important for the design to reduce the noise output from main source and transmitting route. The acoustic analysis using BEASY and dynamic analysis using ANSYS will be conducted to predict the noise level at 15m far away railway wagon when it travels along a track at 100km/h in this research. This calculated noise is from the structural vibration only, and do not include other noise sources on the railway wagon which may contribute to the total noise. This analysis can also be used to company or country to play an important part in reducing noise caused by traffic. This can be done by
predetermining what should be located in a particular area by the use of the structure and local plans and thus preventing residential complaints. 交通噪音因為常受到人們的抱怨因此成為重要的環境問題，為了解決因噪音問題所引起周圍居民的抱怨及投訴，如何分析及減少交通噪音便變的非常重要。本研究將嘗試結合振動及噪音分析理論及軟體，針對運煤車在100公里/小時的行進速度下，在15公尺遠的地方進行聲場分析，分析結果顯示當頻率為20到1000Hz時，可以得到15公尺處的聲音大小為85.1dB，若考慮A加權時則為72.9 dB(A)，分析結果可作為未來運煤車營運規劃或一般交通運輸作為噪音預估及改善之依據。
