Benchmarking of acoustic feedback suppression algorithms
Summary:
Feedback cancellation is of extreme importance in hearing aids for severely hearing impaired listeners and more generally in view of the recently introduced more comfortable open fittings in the ear canal. Acoustic feedback limits the maximum gain that can be used in a hearing aid without making it unstable which results in whistling and distortion. Feedback cancellation algorithms may provide a solution for this problem. Although recently some algorithms have become available in digital hearing aids, these feedback cancellation strategies are still unsatisfactory and no standard objective procedures exist for appropriate evaluation. In this project better processing strategies and objective evaluation procedures for acoustic feedback suppression techniques will be designed.
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