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Authors: Filipe Morais and J. M. Sá da Costa

Affiliation: Instituto Superior Técnico, Technical University of Lisbon, Portugal

ISBN: 972-8865-12-0

Keyword(s): Active noise control, feedforward control, filtered-reference LMS, modified filtered-reference LMS, filtered-u, frequency domain filtered-reference LMS.

Related Ontology Subjects/Areas/Topics: Adaptive Signal Processing and Control ; Informatics in Control, Automation and Robotics ; Signal Processing, Sensors, Systems Modeling and Control

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.

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Paper citation in several formats:
Morais F.; Sá da Costa J. and (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

@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},
}

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

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