Exterior noise of a high-speed train
Transport by high-speed train is becoming more widespread particularly in these climate-conscious times. How can the external noise from these moving sources be efficiently measured and assessed?
The high-speed train network is growing fast worldwide, particularly in China. Many of the lines pass close to urban areas so the external noise produced by the trains is of great interest to town planners and train manufacturers alike.
This paper presents a detailed investigation into the contributions of the various high-speed train sound sources, such as the bogie, pantograph, coach centre, etc., to the exterior noise, both experimentally and through simulations. The measurement points of pass-by noise were arranged according to the international standard ISO 3095. The noise source identification was conducted using a 78-channel wheel microphone array, and the rail vehicle moving source beamforming method was used for the source analysis. A numerical model of the exterior noise of the highspeed train was established based on the array acoustics method and the inputs come from the array measurements.