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Related Experiment Videos

Enhancing the speech envelope of continuous interleaved sampling processors for cochlear implants.

L Geurts1, J Wouters

  • 1Lab. Exp. ORL, KULeuven, Belgium. Luc.Geurts@uz.kuleuven.ac.be

The Journal of the Acoustical Society of America
|April 23, 1999
PubMed
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A new cochlear implant speech processing method, enhanced continuous interleaved sampling (EECIS), improves speech intelligibility by incorporating auditory nerve rapid adaptation. This leads to better consonant and vowel sound identification for users.

Area of Science:

  • Audiology
  • Biomedical Engineering
  • Speech Processing

Background:

  • Cochlear implant technology aims to restore hearing by processing sound signals.
  • Current speech processing strategies like Continuous Interleaved Sampling (CIS) have limitations in capturing rapid neural responses.
  • Auditory nerve adaptation plays a crucial role in speech perception.

Purpose of the Study:

  • To introduce and evaluate a novel speech envelope coding strategy for cochlear implants.
  • To incorporate rapid auditory nerve adaptation into the enhanced continuous interleaved sampling (EECIS) strategy.
  • To assess the impact of EECIS on speech intelligibility in postlingually deafened cochlear implant users.

Main Methods:

  • Developed an enhanced envelope coding strategy (EECIS) incorporating rapid adaptation.

Related Experiment Videos

  • Conducted perceptual tests with six postlingually deafened cochlear implant users (LAURA system).
  • Evaluated identification of stop consonants in various vowel contexts and monosyllabic consonant-vowel-consonant (CVC) words.

    • Main Results:

    • Significant improvement in stop consonant identification in /a/ context (46% CIS vs. 55% EECIS, p=0.026), particularly for place of articulation.
    • Significantly higher identification scores for medial vowels in CVC words (39% CIS vs. 46% EECIS, p=0.018).
    • No significant differences for stop consonants in /i/, /u/ contexts or for initial/final CVC consonants.

    Conclusions:

    • Incorporating rapid adaptation into cochlear implant speech processing (EECIS) enhances speech intelligibility.
    • The EECIS strategy improves the perception of crucial speech features like place of articulation and medial vowels.
    • This advancement offers potential for improved communication outcomes in cochlear implant recipients.