지면에 고정된 선형 마이크로폰 어레이를 이용한 pass-by 소음의 가시화Visualization of pass-by noise by means of a line array of microphones affixed to the ground

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This paper introduces the improved moving frame acoustic holography (MFAH) method and its application. MFAH allows us to visualize the noise generated by moving noise sources by employing a vertical line array of microphones affixed to the ground. The sound field generated by moving sources is different from that of stationary ones due to the movement of the sources. Therefore the measured sound pressure by the microphone on the ground has to be processed so that it cooperates the effect of the movement. This paper discusses the effect of moving noise sources on the obtained hologram by MFAH. This assures the applicability of MFAH to the visualization of moving sources. This paper also reviews the improved MFAH that can visualize a coherent narrow band noise and a pass-by noise. The practical applicability of the improved MFAH was demonstrated by visualizing tire noise during a pass-by test.
Publisher
한국소음진동공학회
Issue Date
2000
Language
KOR
Citation

창립10주년기념 소음진동학술대회 , pp.1479 - 1486

URI
http://hdl.handle.net/10203/137316
Appears in Collection
ME-Conference Papers(학술회의논문)
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