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New developments in speech pattern element hearing aids for the profoundly deaf

A Faulkner1, J R Walliker, I S Howard

  • 1Department of Phonetics and Linguistics, University College London, United Kingdom.

Scandinavian Audiology. Supplementum
|January 1, 1993
PubMed
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New hearing aid developments improve speech understanding for the profoundly hearing-impaired. Compound speech pattern coding and a multi-layer perceptron (MLP) algorithm enhance lipreading, especially in noisy environments.

Area of Science:

  • Audiology
  • Speech Processing
  • Hearing Aid Technology

Background:

  • Profound hearing impairment significantly impacts speech perception and lipreading.
  • Conventional hearing aids often struggle to restore full auditory information, especially for complex speech patterns.
  • Developing advanced acoustic cues for hearing aids can improve speech comprehension for lipreading.

Purpose of the Study:

  • To introduce and evaluate novel speech pattern processing techniques for hearing aids.
  • To assess the efficacy of compound speech pattern coding and MLP-based fundamental frequency extraction.
  • To compare the performance of these new aids against conventional amplification in hearing-impaired listeners.

Main Methods:

  • Compound speech pattern coding using voice fundamental frequency, aperiodic excitation, and amplitude envelope.

Related Experiment Videos

  • Audio-visual speech reception assessments with profoundly hearing-impaired listeners.
  • Utilizing a trained multi-layer perceptron (MLP) algorithm for real-time voice fundamental frequency extraction in hearing aids.
  • Evaluating aided lipreading for speech in noise.

    • Main Results:

    • Addition of amplitude information to the fundamental frequency pattern improved consonant recognition and connected discourse tracking (CDT).
    • Encoding voiceless speech excitation with amplitude information further enhanced consonant identification but not CDT.
    • MLP-based aids significantly improved consonantal voicing contrast reception in noise compared to conventional amplification.

    Conclusions:

    • Compound speech pattern elements may offer a near-optimal basis for acoustic aids to lipreading.
    • MLP-based fundamental frequency extraction integrated into hearing aids shows significant benefits for speech-in-noise perception.
    • These advancements hold promise for improving speech understanding in individuals with profound hearing loss.