An active noise cancelling algorithm with secondary path modeling

Authors:
Edgar Lopez-Caudana;Pablo Betancourt;Enrique Cruz;Mariko Nakano-Miyatake;Hector Perez-Meana
Affiliations:
DIEM DIA, Tecnologico de Monterrey CCM, Mexico D.F., Mexico;DIEM DIA, Tecnologico de Monterrey CCM, Mexico D.F., Mexico;DIEM DIA, Tecnologico de Monterrey CCM, Mexico D.F., Mexico;Mechanical and Electrical Engineering School, National Polytechnic Institute, Mexico D.F., Mexico;Mechanical and Electrical Engineering School, National Polytechnic Institute, Mexico D.F., Mexico
Venue:
ICCOMP'08 Proceedings of the 12th WSEAS international conference on Computers
Year:
2008

Citing 3
Cited 1

Adaptive signal processing

Adaptive signal processing
Active Noise Control Systems: Algorithms and DSP Implementations

Active Noise Control Systems: Algorithms and DSP Implementations
A hybrid noise canceling structure with secondary path estimation

ACACOS'08 Proceedings of the 7th WSEAS International Conference on Applied Computer and Applied Computational Science

A hybrid noise cancelling algorithm with secondary path estimation

WSEAS Transactions on Signal Processing

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Abstract

This paper presents a hybrid active noise canceling (HANC) algorithm to overcome the acoustic feedback present in most ANC system, together with an efficient secondary path estimation scheme. The HANC system provides a solution of two fundamental problems present in these kind of ANC systems: The first consists in a reduction of the acoustic feedback from the cancellation loudspeaker to the input microphone, using two FIR adaptive filters, one with a feedforward configuration an the other with a feedback adaptive filter configuration. To overcome the secondary path modeling problem, a modification of the method proposed by Akhtar is used. Computer simulation results are provide to show the noise cancellation and secondary path estimation performance of presented scheme.