Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Active Noise Control in the Duct Using the Ring-type Smart Foam and the Optimization of a Cancellation Path

환형 스마트 폼을 이용한 덕트 내부의 능동 소음 제어 및 상쇄 경로 최적화

  • 한제헌 (현대/기아자동차 영구개발본부) ;
  • 강연준 (서울대학교 기계항공공학부)
  • Published : 2003.07.01
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Abstract

This paper presents a method for active noise control (ANC) in a duct by using a ring-tyPe smart foam. The ring-type smart foam consists of an elastic porous material of lining shape and a PVDF film embedded In the material. The PVDF element acts as a secondary sound source to reduce the noise. Active noise control using a ring-type smart foam is only effective locally because of the way to excite radially. To enlarge the quiet zone, the duct Is lined with additional acoustic foam between the smart foam and the error microphone. When cancellation path ks optimized by the LMS/RLS algorithm, the computation power is reduced while control performance Is maintained. The filtered-x LMS algorithm is used to minimize the error signal.

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References

  1. Fundamentals of Acoustics Kinsler,L.E.;Frey,A.R.;Coppens,A.B.;Sanders,J.V.
  2. 한국소음진동공학회논문집 v.11 no.3 스마트 폼을 이용한 덕트 내부의 능동 소음 제어 김표재;강연준;조영만
  3. Journal of the Acoustical Society of America v.101 no.4 Smart Foam for Applications in Passiveactive Noise Radiation Control Gentry,C.A.;Guigou,C.;Fuller,C.R. https://doi.org/10.1121/1.418234
  4. Application Note 1242138 Measurment Specialties Piezoelectric Polymer Speakers
  5. System Identication Theory for User Ljung,L.
  6. The Fourier Transform and Its Applications Ronald,N.Bracewell
  7. Active Control of Noise and Vibration Hansen,C.H.Snyder,S.D.
  8. Adaptive Filter Theory Simon Haykin