Multiband compression and contrast-enhancing frequency shaping in hearing aids

Auteurs-es

  • Ian C. Bruce Department of Electrical Engineering, McMaster University, 1280 Main St. W., Hamilton, Ont. L8S 4K1, Canada
  • Shahab U. Ansari Department of Electrical Engineering, McMaster University, 1280 Main St. W., Hamilton, Ont. L8S 4K1, Canada
  • Harjeet S. Bajaj Department of Electrical Engineering, McMaster University, 1280 Main St. W., Hamilton, Ont. L8S 4K1, Canada
  • Kamran Mustafa Department of Electrical Engineering, McMaster University, 1280 Main St. W., Hamilton, Ont. L8S 4K1, Canada

Mots-clés :

Algorithms, Amplification, Bandwidth, Computational complexity, Speech processing, Synchronization, Tuning, Contrast-enhancement frequency shaping (CEFS), Filterbank implementation, Formant-tracking, Multiband compression

Résumé

A hearing-aid amplification scheme that uses a formant-tracking algorithm and time-varying filter to produce improved contrast enhancement between formants is presented. The combination of contrast-enhancing frequency shaping (CEFS) amplification and multiband compression in a single frequency-domain filterbank implementation is also studied. CEFS compensates for the broadened tuning curves and elevated thresholds of an impaired ear by adjusting the relative amplitudes of the formats without distorting the spectral envelope between the formats. The new multiband-CEFS (M-CEFS) algorithm utilizes a formant tracker to direct the gain-frequency response of a time-varying filter.

Fichiers supplémentaires

Publié-e

2004-09-01

Comment citer

1.
Bruce IC, Ansari SU, Bajaj HS, Mustafa K. Multiband compression and contrast-enhancing frequency shaping in hearing aids. Canadian Acoustics [Internet]. 1 sept. 2004 [cité 15 juill. 2024];32(3):62-3. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1628

Numéro

Vol. 32 No. 3 (2004)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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