Active Control of External Noise Radiated From Duct Using Sound Intensity

음향 인텐시티를 이용한 관 외부 방사 소음의 능동 제어

  • 강성우 (삼성전자(주) 기술총괄기반기술센터) ;
  • 김양한 (한국과학기술원 기계공학과 소음 및 진동제어연구센터(NOVIC))
  • Published : 1997.06.01

Abstract

Mean active intensity based active control for the cancellation of radiated noise out of the duct exit is studied. The active intensity control strategy is drerived based on the relation of the exterior sound field out of the duct termination and interior sound field of the duct. One of the characteristics of this control strategy is that the control performance can be maintained regardless of the sensor loction, compared with the conventional local pressure control methods at either interior downstream or exterior field positions. It is also suggested that the digital filtering for the active intensity control can be achieved by time-domain filtered-x LMP (Lest-Mean-Product) adaptive algorithm. Experiments for an open-ended duct are performed to compare the active intensity control performance with conventional pressure control one. Active control experiment of local sound pressure is conducted by widely used filtered-x LMS adaptive Algorithm and active intensity control implementaion uses the derived filter d-x LMP algorithm. It is shown that the exterior sound fileds was much better observable by sensing of the active intensity than by just sound pressure. It is also demonstrated that the global control performance of external field by acoustic intensity is superior to the conventional sound pressure control performance.

Keywords

References

  1. Journal of Sound and Vibration v.27 no.3 Active Sound Absorber in an Air Conditioning Duct M. J. M. Jessell;G. A. Mangiante
  2. ASME Journal of Vibration, Acoustics,Stress and Reil-ability in Design v.106 A Study of Active Control of Noise in Ducts J. Tichy;G. E. Warnaka;L. A. Poole
  3. Journal of Sound and Vibration v.100 The Influence of Waveguide Reflections and System Configuration on the Preformance of an Active Noise Attenuator R. F. La fontaine;I. C. Shepherd
  4. Journal of Acoustical Society of America v.94 no.2 A Comparison of Error Sensor Strategies for the Active Control of Duct Noise A.C. Zander;C. H. Hansen
  5. Journal of Sound and Vibration v.173 no.2 Active Control of Sound in Acoustic Waveguides, Part Ⅰand Ⅱ S. J. Stell;R. J. Bernard
  6. 한국과학기술원, 석사학위논문 반사파가 있는 관내의 능동 소음 제어 오상헌
  7. 한국과학기술원, 석사학위논문 주파수 영역에서 음파분리법에 의한 덕트소음의 능동소음제어 김재권
  8. Adaptive Signal Processing B. Widrow;S. D. Stearns
  9. IEEE Transactions on Acoustics, Speech and Signal Processing v.SAAP-35 The Selection and Application of an IIR Adaptive Filter for tuse in Active Sound Attenuation L. J. Eriksson;M. C. Allie;R. A. Greiner
  10. Acoustical Society of America Structures, and Their Interaction M. C. Junger;D. Felt
  11. Acoustical Society of America Acoutics:An Introduction to Its Physical Properties and Applications A. D. Pierce
  12. Proc. of Active 95 Control of Acoustic Intensity using the Frequency-Domain Filtered-x Algorithm K. M. Reichard;D.C.Swanson;S.M. Hirch
  13. Journal of Acoustical Society of America v.96 no.1 An Adaptive Filtered-x Algorithm for Energy-Based Active COntrol S. D. Sommerfeldt;P. J. Nashif
  14. Accepted for the Publications to Journal of Sound and Vibration Active Intensity Control for the Reduction of Radiated Duct Noise S.-W. Kang;Y.-H. Kim
  15. Sound Intensity,(Second Edition) F. J. Fahy
  16. Journal of Sound and Vibration v.181 no.5 Green Function Analysis of the Acoustic Field in a Finite Three-Port Circular Chamber S.-W.Kang;Y.-H.Kim
  17. Journal of Sound and Vibration v.110 A Study of Active Attenuation of Broadband Noise J. Kazakia
  18. Journal of Acoustic Society of America v.92 no.5 Intensity Measurements in the Presence of Standing Waves R.W.Guy;J.Li