N Noise emision is an overal noise value when th train crosses (Leq). This study aims at determining the amount of noise emission when the train crosses at measuring point, determining the noise emission level based on the train velocity during crossing the rail, and also determining the frequency spectrum of noise level produced during the train crosses the measuring point. Anylizing data start with processing data dan observing the experiment. Analysing data starts with processing data and observing the experiment. Analyzing data processes uses a tool called Sound A. Anlyzer type B & K 2250 with a software BZ -5503 - Measurement Partner Suite. Frequence spectrum in is the cycle amount in each second of a reversible flow. Hertz is the unit used for measuring frequence and can be abbreviated as Hz. One (1) Hz is equal to frequency and can ber finishing one cycle in second. The basic of Leq ia valuing z, Which is the same as valuing C, although the diffrence is the frequency used is from 20 Hz to 10 Khz. As for the result, data show that the velocity value has a proportional relation with Lmax and Leq; the higher the train velocity that passes, the higher the noise level produced (Lmax and Leq). This is proven by the amount of correlation coefficient between Lmax and velocity, as well as Leq where the Lmax value is 0, 952 and 0,92 for Leq. Based on the data result, the most dominant frequency that,s been measured for each train that passes are 63 Hz and 250 Hz. But when the velocity reaches 80-89 km/hour, the frequency alter resulting the most dominant frequency 31,5 Hz, whereas the frequency above 31 5 Hz has almost the same pattern