Real-time feedback cancellation in hearing aids

Auteurs-es

  • Horst Arndt Unitron Hearing Ltd., 20 Beasley Drive, Kitchener, Ont. N2G 4X1
  • Henry Luo Unitron Hearing Ltd., 20 Beasley Drive, Kitchener, Ont. N2G 4X1

Mots-clés :

Closed loop control systems, Computational methods, Costs, Detectors, Feedback, Nyquist diagrams, Patient monitoring, Signal processing, Digital systems, Feedback canceler, Feedback detection technologies, Frequency bands, Signal quality

Résumé

The real-time adaptive feedback canceller in a digital hearing aid during telephone use is studied. Detection of feedback onset involves five criteria such as continous and limited input signal level variation, continous modulation of input signal level, duration of specific input signal, and difference between the current gain to the maximum deliverable gain. It is observed that when feedback is detected, the adaptive feedback canceller modifies the system gain around the knee-point. It is suggested to detect the onset of the feedback build-up pattern to prevent any audible feedback reaching the hearing aid user's ear.

Fichiers supplémentaires

Publié-e

2004-09-01

Comment citer

1.
Arndt H, Luo H. Real-time feedback cancellation in hearing aids. Canadian Acoustics [Internet]. 1 sept. 2004 [cité 4 mai 2026];32(3):68-9. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1631

Numéro

Vol. 32 No. 3 (2004)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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