ACTIVE ACOUSTIC NOISE CONTROL IN DUCTS

Filipe Morais, J. M. Sá da Costa

2004

Abstract

In this paper existing classical and advanced techniques of active acoustic noise cancellation (ANC) in ducts are collected and compared. The laboratory plant used in experience showed a linear behaviour and so the advanced techniques were not used. Due to delay on the plant, the feedback classical techniques could not be applied. The best results were obtained with the modified filtered-reference LMS (MFX-LMS) and filtered-u techniques. A very important conclusion is that the quadratic normalisation is needed to maintain the algorithms always stable. In this paper 18dB of attenuation of white noise and 35 dB of attenuation of tonal noise were achieved. Thus, ANC can be applied in a real situation resulting in important noise attenuations.

References

  1. Elliot, S. J., 2001. Signal Processing for Active Control. Academic Press, London.
  2. Haykin, Simon, 2002. Adaptive Filter Theory. Prentice Hall, New Jersey, 4th edition.
  3. Ogata, Katsuhiko, 1997. Modern Control Engineering. Prentice Hall, New Jersey, 3rd edition.
  4. Oppenheim, Alan V., Schafer, Ronald W. and Buck, John R., 1999. Discrete-time Signal Processing. Prentice Hall, New Jersey, 2nd edition.
  5. Tokhi, M. and Leitch, R. R., 1992. Active Noise Control. Oxford University Press, New York.
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Paper Citation


in Harvard Style

Morais F. and Sá da Costa J. (2004). ACTIVE ACOUSTIC NOISE CONTROL IN DUCTS . In Proceedings of the First International Conference on Informatics in Control, Automation and Robotics - Volume 3: ICINCO, ISBN 972-8865-12-0, pages 214-221. DOI: 10.5220/0001141102140221


in Bibtex Style

@conference{icinco04,
author={Filipe Morais and J. M. Sá da Costa},
title={ACTIVE ACOUSTIC NOISE CONTROL IN DUCTS},
booktitle={Proceedings of the First International Conference on Informatics in Control, Automation and Robotics - Volume 3: ICINCO,},
year={2004},
pages={214-221},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001141102140221},
isbn={972-8865-12-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the First International Conference on Informatics in Control, Automation and Robotics - Volume 3: ICINCO,
TI - ACTIVE ACOUSTIC NOISE CONTROL IN DUCTS
SN - 972-8865-12-0
AU - Morais F.
AU - Sá da Costa J.
PY - 2004
SP - 214
EP - 221
DO - 10.5220/0001141102140221