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Title: Active suppression of narrowband noises in 3D sound fields
Authors: Yuan, J 
Keywords: Active noise control
Narrowband noise rejection
Secondary path estimation
Issue Date: 2005
Publisher: Pergamon Press
Source: Applied acoustics, 2005, v. 66, no. 1, p. 89-103 How to cite?
Journal: Applied acoustics 
Abstract: This paper presents a simple multiple-input-multiple-output (MIMO) controller for active suppression of narrowband noise in 3D sound fields. The controller only depends on a complex matrix H(jω0) instead of an n × n transfer matrix to model the secondary paths. Unlike other available ANCs that obtain the controller transfer functions by adaptation, the proposed one solves its controller transfer matrix directly from H(jω0); and tolerates some degrees of errors in H(jω0). If necessary, the proposed system may be made adaptive to trace the drifting secondary path. Online identification of a matrix H(jω0) is easier than that of a transfer matrix with many coefficient matrices. The estimate would be more accurate for H(jω0) if other conditions remain the same. The proposed scheme can be modified to suppress narrow-band noises with multiple bands by a moderate increase in complexity.
ISSN: 0003-682X
EISSN: 1872-910X
DOI: 10.1016/j.apacoust.2004.06.009
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