Aspects of inverse filtering for loudspeakers

Auteurs-es

  • Scott G. Norcross Advanced Audio Systems, Communications Research Centre, Station H, 3701 Carling Ave., Ottawa, Ont. K2H 8S2

Mots-clés :

Discrete Fourier transforms, Frequency domain analysis, Impulse response, Least squares approximations, Optimization, Signal processing, Vectors, Wave filters, Audio quality, Frequency-domain deconvolution method, Inverse filtering, Linear filtering

Résumé

The time-domain least squares approach and the frequency-domain deconvolution method for the calculation of inverse filters of a loudspeaker's IR are examined. The frequency-domain method is less robust than the time-domain method and regularization and complex smoothing help in improving the subjective performance of the inverse filter. The amount of regularization required is dependent on the IR that is to be inverted, and hence require hand-tuning for optimizing the subjective performance. The complex smoothing of the impulse response with a third octave smoother improves the subjective performance of the inverse filter and does not broaden the main pulse of the corrected IR.

Fichiers supplémentaires

Publié-e

2004-09-01

Comment citer

1.
Norcross SG. Aspects of inverse filtering for loudspeakers. Canadian Acoustics [Internet]. 1 sept. 2004 [cité 13 mai 2026];32(3):156-7. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1675

Numéro

Vol. 32 No. 3 (2004)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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