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http://dx.doi.org/10.7782/JKSR.2012.15.1.023

Noise Sources Localization on High-Speed Trains by using a Microphone Array  

Noh, Hee-Min (한국철도기술연구원 고속철도연구본부)
Cho, Jun-Ho (한국철도기술연구원 에코시스템연구실)
Choi, Sung-Hoon (한국철도기술연구원 고속철도연구본부)
Hong, Suk-Yoon (서울대학교 조선해양공학부)
Publication Information
Journal of the Korean Society for Railway / v.15, no.1, 2012 , pp. 23-28 More about this Journal
Abstract
In this paper, noise of Korean high-speed trains (KTX) running at different speed from 150 to 300km/h was measured by a microphone array system. From the measurement, relation between maximum sound pressure levels and train moving speeds of KTX was drawn and a regression coefficient from the relation was also derived. Moreover, increases of SPL with speeds of KTX were analyzed in the frequency domain. From the analysis, sound characteristics of passing-by noise of KTX were provided. Then, dominant noise source areas were obtained from the measurements and propagation patterns of KTX in vertical direction were also investigated. Finally, noise sources of KTX were identified from inspection of noise maps.
Keywords
Sound Pressure Level; Noise Measurement; Sound Pressure Characteristics; Noise Sources;
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  • Reference
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