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Signal Processing in High-End Hearing Aids: State of the Art, Challenges, and Future Trends

Abstract

The development of hearing aids incorporates two aspects, namely, the audiological and the technical point of view. The former focuses on items like the recruitment phenomenon, the speech intelligibility of hearing-impaired persons, or just on the question of hearing comfort. Concerning these subjects, different algorithms intending to improve the hearing ability are presented in this paper. These are automatic gain controls, directional microphones, and noise reduction algorithms. Besides the audiological point of view, there are several purely technical problems which have to be solved. An important one is the acoustic feedback. Another instance is the proper automatic control of all hearing aid components by means of a classification unit. In addition to an overview of state-of-the-art algorithms, this paper focuses on future trends.

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Correspondence to V. Hamacher.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hamacher, V., Chalupper, J., Eggers, J. et al. Signal Processing in High-End Hearing Aids: State of the Art, Challenges, and Future Trends. EURASIP J. Adv. Signal Process. 2005, 152674 (2005). https://doi.org/10.1155/ASP.2005.2915

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Keywords and phrases:

  • digital hearing aid
  • directional microphone
  • noise reduction
  • acoustic feedback
  • classification
  • compression