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Speech sounds: evaluation of a device for their visual presentation

A R Potvin, K G Foreit, K Lam

    Archives of Physical Medicine and Rehabilitation
    |November 1, 1980
    PubMed
    Summary

    A new Visual Speech Spectrum Analyzer (VISSA) shows potential for hearing-impaired individuals. This speech visualization device may aid in speech therapy and hearing assistance, despite minor differences from normal auditory perception.

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    Area of Science:

    • Audiology
    • Speech-Language Pathology
    • Assistive Technology

    Background:

    • Hearing impairment presents significant communication challenges.
    • Visual aids for speech perception are being explored as assistive technologies.
    • Existing assistive devices may not fully capture the nuances of speech sounds.

    Purpose of the Study:

    • To evaluate a prototype device, the Visual Speech Spectrum Analyzer (VISSA), for presenting speech sounds visually.
    • To assess the potential of VISSA as an assistive device for individuals with hearing impairments.
    • To compare the visual and auditory distinctiveness of speech sounds.

    Main Methods:

    • Two experiments were conducted involving adults with unimpaired hearing.
    • Experiment 1 assessed recognition of visual patterns for three vowels spoken by three different speakers.

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  • Experiment 2 compared the visual and auditory distinctiveness of these three vowels.

    • Main Results:

    • Subjects perceived distinct speech information from the VISSA compared to the normal auditory system.
    • Differences in speech information between the visual device and auditory system were considered minor.
    • The visual patterns of vowels were recognized by unimpaired listeners.

    Conclusions:

    • The Visual Speech Spectrum Analyzer (VISSA) demonstrates potential as a speech therapy aid.
    • The device may offer benefits to individuals with hearing impairments.
    • Further research is warranted to optimize VISSA for practical assistive applications.