Title:
SYSTEMS AND METHODS FOR ADAPTING ESTIMATED SECONDARY PATH
Document Type and Number:
WIPO Patent Application WO/2022/061359
Kind Code:
A3
Abstract:
A noise-cancellation system with secondary path adaptation, includes: a noise-cancellation filter configured to receive a reference signal representative of a source of noise within a predefined volume and generating, based at least in part on the reference signal, a noise-cancellation signal that, when transduced by a speaker, produces a noise-cancellation acoustic signal that reduces noise in a cancellation zone within the predefined volume; a secondary path estimation filter configured to receive an input signal and to implement an estimate of secondary path transfer function, the secondary path transfer function being a transfer function between the speaker and a cancellation zone, the secondary path estimation filter outputting an output signal based, at least in part, on the estimate of the secondary path transfer function and the input signal; an adaptive module configured to adjust coefficients of the noise-cancellation filter according to a first adaptive algorithm, based, at least in part, on the estimated output signal; and an secondary path adaptive module configured to adjust coefficients of the secondary path estimation filter according to a second adaptive algorithm, wherein a rate of adaptation of the second adaptive algorithm is based, at least in part, on a coherence between the reference signal and an error signal representative of residual noise within the cancellation zone.
More Like This:
Inventors:
JAIN ANKITA D (US)
Application Number:
PCT/US2021/071489
Publication Date:
April 21, 2022
Filing Date:
September 16, 2021
Export Citation:
Assignee:
BOSE CORP (US)
International Classes:
G10K11/178
Foreign References:
| US20050207585A1 | 2005-09-22 | |||
| US5940519A | 1999-08-17 | |||
| US20200074976A1 | 2020-03-05 |
Other References:
GOMATHI K. ET AL: "Variable Step Size for Improving Convergence of FxLMS Algorithm", PROCEDIA TECHNOLOGY, vol. 25, 1 January 2016 (2016-01-01), NL, pages 420 - 426, XP055870339, ISSN: 2212-0173, DOI: 10.1016/j.protcy.2016.08.127
KUO S M ET AL: "ACTIVE NOISE CONTROL: A TUTORIAL REVIEW", PROCEEDINGS OF THE IEEE, IEEE. NEW YORK, US, vol. 87, no. 6, 1 June 1999 (1999-06-01), pages 943 - 973, XP011044219, ISSN: 0018-9219, DOI: 10.1109/5.763310
M.T. AKHTAR ET AL: "A new variable step size LMS algorithm-based method for improved online secondary path modeling in active noise control systems", IEEE TRANSACTIONS ON AUDIO, SPEECH AND LANGUAGE PROCESSING, vol. 14, no. 2, 1 March 2006 (2006-03-01), US, pages 720 - 726, XP055493290, ISSN: 1558-7916, DOI: 10.1109/TSA.2005.855829
AHMED S ET AL: "A new variable step size method for online secondary path modeling in multichannel (1x2x2) active noise control systems", INFORMATION AND EMERGING TECHNOLOGIES (ICIET), 2010 INTERNATIONAL CONFERENCE ON, IEEE, PISCATAWAY, NJ, USA, 14 June 2010 (2010-06-14), pages 1 - 6, XP031793126, ISBN: 978-1-4244-8001-2
KUO S M ET AL: "ACTIVE NOISE CONTROL: A TUTORIAL REVIEW", PROCEEDINGS OF THE IEEE, IEEE. NEW YORK, US, vol. 87, no. 6, 1 June 1999 (1999-06-01), pages 943 - 973, XP011044219, ISSN: 0018-9219, DOI: 10.1109/5.763310
M.T. AKHTAR ET AL: "A new variable step size LMS algorithm-based method for improved online secondary path modeling in active noise control systems", IEEE TRANSACTIONS ON AUDIO, SPEECH AND LANGUAGE PROCESSING, vol. 14, no. 2, 1 March 2006 (2006-03-01), US, pages 720 - 726, XP055493290, ISSN: 1558-7916, DOI: 10.1109/TSA.2005.855829
AHMED S ET AL: "A new variable step size method for online secondary path modeling in multichannel (1x2x2) active noise control systems", INFORMATION AND EMERGING TECHNOLOGIES (ICIET), 2010 INTERNATIONAL CONFERENCE ON, IEEE, PISCATAWAY, NJ, USA, 14 June 2010 (2010-06-14), pages 1 - 6, XP031793126, ISBN: 978-1-4244-8001-2
Attorney, Agent or Firm:
GRAY, Jonathan L. et al. (US)
Download PDF: