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http://dx.doi.org/10.7776/ASK.2014.33.4.238

Theoretical Analysis on the Array Microphone Measurement for Noise from Rails  

Ryue, Jungsoo (울산대학교 조선해양공학부)
Jang, Seungho (한국철도기술연구원 에코시스템연구실)
Kwon, Hyu-Sang (한국표준과학연구원 유동음향센터)
Publication Information
The Journal of the Acoustical Society of Korea / v.33, no.4, 2014 , pp. 238-247 More about this Journal
Abstract
In this paper, rail vibration and its sound radiation are investigated, then the rail noise measurement by using microphone array is explored theoretically. A concrete slab track for domestic high speed trains is modeled as a Timoshenko beam on elastic support, regarding the moving of the excitation force on the rail. From the radiation characteristics of rail noise generated by a line source, the effect of moving load on sound radiation is obtained. Also it is found that the beam angle of the microphone array is a prominent factor to measure the rail noise level reliably because the rail noise propagates as a plane wave. In this investigation, a proper beam angle for the rail noise measurement by microphone array is suggested.
Keywords
Rail noise; Moving load; Microphone array;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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