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Related Experiment Videos

Digital signal processing (DSP) applications for multiband loudness correction digital hearing aids and cochlear

N Dillier1, T Frölich, M Kompis

  • 1Department of Otorhinolaryngology, University Hospital, Zürich, Switzerland.

Journal of Rehabilitation Research and Development
|January 1, 1993
PubMed
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Digital signal processors (DSPs) enhance hearing aid algorithms like adaptive beamforming and multiband loudness correction (MLC). Experiments show significant speech discrimination improvements for hearing-impaired users with these advanced DSP technologies.

Area of Science:

  • Biomedical Engineering
  • Signal Processing
  • Audiology

Background:

  • Digital signal processors (DSPs) offer flexible implementation of advanced algorithms for hearing assistance.
  • Current hearing aid technologies require optimization for real-world noise and diverse user needs.

Purpose of the Study:

  • To optimize and evaluate adaptive beamformer noise reduction algorithms using DSPs.
  • To assess the performance of a multiband loudness correction (MLC) algorithm in digital hearing aids.
  • To investigate real-time speech coding strategies for cochlear implants on DSP platforms.

Main Methods:

  • Experiments were conducted with normal-hearing and hearing-impaired subjects to test noise reduction algorithms.
  • A digital hearing aid system implemented a multiband loudness correction (MLC) algorithm.

Related Experiment Videos

  • Speech coding strategies were implemented in real-time on a DSP speech processor for cochlear implants.

    • Main Results:

    • Optimized adaptive beamformer noise reduction showed effectiveness in realistic environments.
    • Speech tests revealed significant improvements in discrimination scores with the MLC algorithm for hearing aid users.
    • High-rate stimulation strategies led to improved speech discrimination in cochlear implant users.

    Conclusions:

    • DSPs enable effective implementation of advanced signal processing for hearing impairment.
    • Multiband loudness correction (MLC) significantly enhances speech understanding for hearing aid users.
    • Further research into hybrid strategies for cochlear implants is warranted to improve speech processing.