Hybrid Active Noise Control Systems Based on the Simultaneous Equations Method

Mitsuji MUNEYASU  Yumi WAKASUGI  Osamu HISAYASU  Kensaku FUJII  Takao HINAMOTO  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E84-A   No.2   pp.479-481
Publication Date: 2001/02/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Noise Cancellation and Reduction Techniques)
Category: Active Noise Control
Keyword: 
active noise control,  simultaneous equations method,  hybrid system,  

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Summary: 
This paper proposes a new hybrid active noise control (ANC) system without the estimation of the secondary path filter in advance. The algorithm of the feedforward part of the proposed method is based on the simultaneous equations method and the feedback part employs the filtered-X LMS algorithm. The estimation of the secondary path filter is obtained in the operation of the feedforward part and it is used in the feedback part. When the secondary path changes in the operation of the system, the proposed system can follow to this change. In the simulation example which treats the colored measurement noise, the fine noise reduction performance is obtained.