Microphone-Array Measurement of High-Speed Train Noise

초록

The microphone array system presented in this paper is a useful tool both to validate the new noise prediction model and to help to design new low-noise-high-speed trains. High-speed train noise is a complex matter, because noise sources are located all over the train, from rail to roof, from front to end. The sources all radiate simultaenously, they are broad band, 100Hz -4000Hz, and they move past an observer beside the track at a very high speed. Therefore, microphone arrays have been in use for more than ten years,above all by SNCF and Deutsche Bahn in the German-French cooperation DEUFRAKO.