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Related Experiment Videos

Preliminary evaluation of a multichannel electrotactile speech processor.

R S Cowan1, J I Alcantara, P J Blamey

  • 1Department of Otolaryngology, University of Melbourne, Royal Victorian Eye and Ear Hospital, Victoria, Australia.

The Journal of the Acoustical Society of America
|June 1, 1988
PubMed
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This study shows that the Tickle Talker, an eight-channel electrotactile aid, significantly improves speech tracking and discrimination for hearing impaired adults. Even without lipreading, performance scores were well above chance, demonstrating its effectiveness.

Area of Science:

  • Audiology
  • Assistive Listening Devices
  • Sensory Substitution

Background:

  • Hearing impairment significantly impacts communication.
  • Electrotactile aids offer a potential solution by converting sound to tactile sensations.
  • Assessing the efficacy of wearable electrotactile devices is crucial for improving speech perception.

Purpose of the Study:

  • To evaluate the performance of a wearable eight-channel electrotactile aid (Tickle Talker) for speech discrimination.
  • To compare speech tracking rates with and without the electrotactile aid in both normally hearing and hearing-impaired individuals.
  • To assess the aid's effectiveness in various speech recognition tasks and its usability in real-world settings.

Main Methods:

  • Speech discrimination tests using open- and closed-set materials were administered.

Related Experiment Videos

  • Participants included four severely to profoundly hearing-impaired adults and seven normally hearing subjects.
  • Speech tracking rates were measured with and without the electrotactile aid, alongside lipreading.

    • Main Results:

    • Significant increases in speech tracking rates were observed for all subjects using the electrotactile aid.
    • Trained normally hearing subjects achieved a mean tracking rate of 55 wpm with tactile input plus lipreading, versus 36 wpm with lipreading alone.
    • Hearing-impaired subjects reached a mean tracking rate of 37 wpm in the aided condition compared to 24 wpm with lipreading alone.
    • Performance on standardized speech recognition tests (CID sentences, CNC words) and phoneme identification significantly improved with the aid.
    • Scores on consonant and vowel identification without lipreading were above chance levels.

    Conclusions:

    • The wearable eight-channel electrotactile aid (Tickle Talker) enhances speech tracking and discrimination abilities.
    • The device shows promise as a valuable tool for individuals with severe to profound hearing impairments.
    • Satisfactory home use was reported by two hearing-impaired subjects, indicating practical applicability.