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Robust loudspeaker equalization based on position-independent excess phase modeling
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group. (Signals and systems)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group. (Signals and systems)
2008 (English)In: 2008 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, VOLS 1-12, 2008, 385-388 p.Conference paper, Published paper (Refereed)
Abstract [en]

A well known problem in loudspeaker equalization is that mixed phase design of the inverse filter causes residual "pre-ringings" in the equalized system, due to the spatial variability of loudspeakerroom transfer functions. A common strategy for robust and perceptually acceptable equalization is therefore to use minimum phase filters only. In this paper, a method for cautious mixed phase equalization is proposed. By analysis of a set of room transfer functions, it is concluded that some non-minimum phase zeros are insensitive to receiver position, and can therefore be robustly inverted. The method improves upon a minimum phase equalization by extending the minimum phase model with a robustly invertible all pass link. Validation measurements show that the time-domain aspect of equalization is improved throughout the spatial region of interest, while preringings are kept at a very low and prespecified level.

Place, publisher, year, edition, pages
2008. 385-388 p.
Series
International Conference on Acoustics Speech and Signal Processing (ICASSP), ISSN 1520-6149
Keyword [en]
loudspeaker equalization, robustness, all-pass excess phase, acoustic signal processing
National Category
Signal Processing
Research subject
Signal Processing
Identifiers
URN: urn:nbn:se:uu:diva-111055ISI: 000257456700097ISBN: 978-1-4244-1483-3 (print)OAI: oai:DiVA.org:uu-111055DiVA: diva2:279245
Conference
33rd IEEE International Conference on Acoustics, Speech and Signal Processing Las Vegas, NV, MAR 30-APR 04, 2008
Available from: 2009-12-02 Created: 2009-12-02 Last updated: 2016-04-12Bibliographically approved

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Brännmark, Lars-JohanAhlén, Anders

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf