Abstract
Noise reduction of pantographs is of special importance for the operation of high-speed trains, since the pantograph noise cannot be treated with passive counter measures like sound barriers. Therefore the noise emission of pantographs was investigated in an acoustically treated wind tunnel for air speeds up to 400 km/h. The aims were to determine the noise reduction potential of pantographs, to investigate their aerodynamic behavior, to validate existing theoretical models, and to compare measurement techniques and wind tunnels. The acoustic measurements were carried out using a microphone array system, a parabolic antenna as well as normal microphones. Two pantographs, which are in service today in Germany and Japan, were used as references. Two full-scale models of high-speed pantographs were tested in several configurations. The achieved noise reduction of the models compared to the reference pantographs confirmed the theoretical results.
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