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http://dx.doi.org/10.7782/JKSR.2012.15.3.231

Aerodynamic Noise Characteristics of High-speed Trains by the Beamforming Method  

Noh, Hee-Min (한국철도기술연구원 고속철도연구본부)
Choi, Sung-Hoon (한국철도기술연구원 고속철도연구본부)
Koh, Hyo-In (한국철도기술연구원 에코시스템연구실)
Hong, Suk-Yoon (서울대학교 조선해양공학부)
Publication Information
Journal of the Korean Society for Railway / v.15, no.3, 2012 , pp. 231-236 More about this Journal
Abstract
In this paper, aerodynamic noise characteristics of high-speed trains were deduced from the beamforming method. First, pass-by noise of high-speed trains was measured by a microphone array system. This measurement suggested that the majority of the aerodynamic noise produced came from the bogie area, the pantograph and its cover, and inter-coach gaps. Then, beampower outputs of a position in high-speed trains were obtained from the beamforming method. By Fourier transform, sound characteristics of the position in the frequency domain were deduced from the beamforming power spectrum. From this study, aerodynamic noise characteristics from the major sources of high-speed trains were drawn.
Keywords
Aerodynamic noises; Sound Characteristics; Beamforming method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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