한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)
- 한국소음진동공학회 2000년도 춘계학술대회논문집
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- Pages.1479-1486
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- 2000
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- 1598-2548(pISSN)
지면에 고정된 선형 마이크로폰 어레이를 이용한 pass-by 소음의 가시화
Visualization of pass-by noise by means of a line array of microphones affixed to the ground
- Park, Soon-Hong (KAIST) ;
- Kim, Yang-Hann (KAIST)
- 발행 : 2000.06.22
초록
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.
키워드