A new on/off scheduling for modeling secondary path in feedforward active noise control systems

Akihisa Oishi, Muhammad Tahir Akhtar, Wataru Mitsuhashi

Research output: Contribution to conferencePaperpeer-review

Abstract

A new technique is proposed for a controlled sound injection to model the secondary acoustic path in the feedforward active noise control (ANC) system. In the proposed system, the tap weights of the adaptive filter for modelling the secondary path are replicated to an additional filter, and a cost function for determining the opening and closing of the sound injection is evaluated with the difference of the powers of errors from both filters. If the acoustic characteristics are altered in the secondary path after closing the sound injection, the detection of outliers in the error from the modelling filter will provide a clue for reopening the injection. In this paper, the authors propose a simple algorithm to open and close the sound injection for modelling the secondary path. The results of numerical simulations show that the proposed technique improves the performance of noise cancellation without relying on the adaptive algorithms most often used in ANC systems.

Original languageEnglish
Pages199-203
Number of pages5
Publication statusPublished - Dec 1 2011
Externally publishedYes
Event6th Triangle Symposium on Advanced ICT 2011, TriSAI 2011 - Daejeon, Korea, Republic of
Duration: Aug 25 2011Aug 26 2011

Conference

Conference6th Triangle Symposium on Advanced ICT 2011, TriSAI 2011
CountryKorea, Republic of
CityDaejeon
Period8/25/118/26/11

ASJC Scopus subject areas

  • Information Systems

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