소음진동 (Journal of KSNVE)

한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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음향 홀로그래피를 이용한 다수의 완전 비상관 소음원들의 가시화

Visualization of Multiple Incoherent Sources Using Nearfield Acoustic Holography

  • 남경욱 (한국과학기술원 대학원 기계공학과) ;
  • 김양한 (한국과학기술원 기계공학과)
  • Published : 1999.10.01
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Abstract

The objective of this paper is to obtain the contribution of each source to the spectrum of pressure, when there are multiple incoherent sources in near-field acoustic holography. For this objective, we have to obtain signals very coherent to the input signals of the sources. To obtain the very coherent signals, many people have measured pressure signals in the vincinity of the sources. However, it is sometimes difficult to locate microphones near to the sources so that the signals are very coherent to the input signals. This paper proposed a method to obtain the very coherent signals by near-field acoustic holography. Therefore, the proposed method does not require the measurement of pressure near to each source. Simulation results for two incoherent monopole sources showed the possibility of the proposed method.

Keywords

References

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