Method for inducing noise characteristics of certain point of train

PURPOSE: A method for drawing noise properties of the specific position of a railroad vehicle is provided to draw properties of noise generated at the specific position such as a pantograph position of a position between passenger cars through predetermined processing processes after measuring the noise of the railroad vehicle at trackside. CONSTITUTION: A method for drawing noise properties of the specific position of a railroad vehicle includes the following steps of: measuring noise of a railroad vehicle near a railroad in which the railway vehicle travels for a predetermined time (210); measuring the speed of the travelling railroad vehicle for a predetermined time (220); setting an analysis position corresponding to the specific position of the railroad vehicle based on the time of the measured noise data by using the measured speed data of the railway vehicle (230); filtering the measured noise data and processing the noise data to have a noise intensity value according to the time (240); calculating the noise data in which a weighted value is applied by applying a predetermined weighted value function to the signal-processed noise data (250); and calculating the noise property data at the specific position of the railway vehicle by processing the noise data in which the weighted value is applied (260, 270). [Reference numerals] (210) Measure noise of a railroad vehicle near a railroad; (220) Measure the speed of the travelling railroad vehicle; (230) Check an analysis position by using the measured speed data of the railway vehicle; (240) Filter the measured noise data above the range of 20 Hz; (250) Apply a weight value based on the analysis position; (260) Modulate frequency by applying the same monitoring curve; (270) Calculate noise properties at the specific position of the vehicle