소음원 대역폭과 측정잡음의 상관관계를 고려한 소음원 탐지기법

Sound Source Detection Technique Considering the Effects of Source Bandwidth and Measurement Noise Correlation

  • 윤종락 (부경대학교 공과대학 전자컴퓨터정보통신공학부)
  • 발행 : 2001.02.01

초록

소음원 위치와 방위를 규명하기 위해 다양한 배열처리기술이 발전되어 왔다. 배열처리기술의 기본은 두 개의 수신센서에 수신된 신호의 시간차를 이용하여 소음원의 위치와 방위를 구하는 것으로 응용분야나 신호처리방법에 따라 고유의 특성을 갖는 빔형성기법, 상관함수기법 및 NAH (Near-Field Acoustic Holography) 등이 있다 본 연구에서는 이러한 기법들 중 광대역 소음원 탐지에 적용되는 상관함수기법을 채택하여 소음원의 대역폭과 측정 잡음원 간의 상관 관계가 위치나 방위 탐지 정확도에 미치는 영향을 분석하여 효과적인 소음원 탐지기법을 제안한다. 본 연구에서 채택한 배열의 기하학적 형상은 위치나 방위의 3차원적 모호성을 없애기 위한 3차원 비선형이며 제안된 기법의 타당성은 수치모의 실험 및 실제 실험으로 검증되었다.

Various array processing techniques to identify the noise source position or bearing have been developed. Typical array processing techniques which are based on time delay between received signals at two sensors, are classified as conventional beamforming, correlation function and NAH (Near-Field Acoustic Holography) techniques which have their own characteristics with respect to application field and signal processing method. In this study, correlation function technique which could be applied for broadband noise source detection, is adopted and the effective detection technique is proposed considering the effects of source bandwidth and measurement noise correlation of noise sources. The validity of the Proposed technique is evaluated using the 3-dimensional nonlinear any which does not give 3-dimensional Position or bearing ambiguity

키워드

참고문헌

  1. Array Signal Processing S. Pillai
  2. JASA v.78 Nearfield acoustic holography : I. Theory of generalized holography and development of NAH D. Maynard;E.G. Willians;Y. Lee
  3. JASA v.81 Nearfield acoustic holography :Ⅱ. Holographic reconstruction algorithms and computer implementation A. Veronesi;J.D. maynard
  4. IEEE Trans. Acoust., Speech, Signal Processing Acoustic event localization using a crosspower-spectrum phase based technique M. Omology;P. Svaizer
  5. IEEE Trans. Acoust., Speech, Signal Processing Acoustic source location in noisy and reverberant environment Using CSP Analysis M. Omology;P. Svaizer
  6. Proceedings of the SPIE A DSP implementation of source location using microphone arrays D.V. Rabinkin;R.J. Ranomeron;A. Dahl;J.C. French;J.L. Flanagan;M.H. Bianchi
  7. IEEE Trans. Acoust., Speech, Signal Processing Voice source localization for automatic camera pointing system in videoconferencing Hong Wang;Peter Chu
  8. 한국소음진동공학회 v.7 no.2 소음원 영상화를 위한 마이크로폰 배열 설계 윤종락;S.A.L. Glegg
  9. Proceedings of the WESTPRAC Ⅶ v.Ⅰ Three dimensional nonlinear array for noise source detection J.R. Yoon;T.J. Kim;K.L. Ha
  10. IEEE Trans. Acoust., Speech, Signal Processing v.24 The generalized correlation method for estimation of time delay C.H. Knapp;G.C. Carter
  11. JASA v.106 no.1 Time-delay estimation of time delay Brian G. Ferguson
  12. IEEE Signal Processing Magazine Signal Processing with Higher-order spectrua Chrysostomos L. Nikias;Jerry M. Mendel
  13. Proc IEEE v.75 Bispectrum estimation: A digital signal processing framework C.L. Nikias;M.R. Raghuveer
  14. IEEE Trans. Acoust., Speech, Signal Processing v.36 Time delay estimation in unknown gaussian spatially correlated noise C.L. Nikias;R. Pan
  15. Proc. IEEE v.75 Bispectrum estimation: A digital signal processing framework C.L. Nikias;M.R. Raghuveer
  16. Signal Processing v.65 Passive near-field localization of multiple non-gaussian sources in 3-D using cumulants R.N. Challa;S. Shamsunder
  17. IEEE Trans. Acoust., Speech, Signal Processing v.Ⅴ Time delay estimation in unknown spatially uncorrelated Gaussian noise using higher order statistics Yong Wu;A.R. Leyman