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A computer-controlled vowel corrector for the hearing impaired.

D J Povel, M Wansink

    Journal of Speech and Hearing Research
    |March 1, 1986
    PubMed
    Summary

    The Vowel Corrector visual aid helps hearing-impaired individuals train speech by displaying vowel information. It shows promise for exploring vowel spaces and differentiating speakers, though spectrally similar vowels remain challenging.

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    Area of Science:

    • Speech-Language Pathology
    • Acoustic Phonetics
    • Assistive Technology

    Background:

    • Hearing impairment presents significant challenges in speech acquisition and training.
    • Effective visual aids are crucial for developing accurate speech production in the hearing impaired.
    • Understanding vowel acoustics is fundamental to speech intelligibility.

    Purpose of the Study:

    • To evaluate the Vowel Corrector, a visual aid for speech training in the hearing impaired.
    • To assess the device's effectiveness in displaying vowel identity and differentiating speakers.
    • To explore the potential of dimensional analysis of vowel spectra for speech training.

    Main Methods:

    • Utilized dimensional analysis of vowel spectra to derive spatial coordinates for vowel representation.
    • Developed a visual display where vowels are represented as distinct areas in a 2D space.
    • Quantified device resolution using a measure of area overlap between different vowel representations.
    • Analyzed the device's performance in differentiating male, female, and child speakers' utterances.

    Main Results:

    • The Vowel Corrector demonstrates promising features for speech training.
    • The device effectively aids in exploring the vowel space and global vowel differentiation.
    • Speaker differentiation (male, female, child) showed positive results.
    • Discrimination of spectrally similar vowels using the device was found to be limited.

    Conclusions:

    • The Vowel Corrector is a valuable tool for speech training in hearing-impaired individuals.
    • The device offers a novel approach to visualizing vowel acoustics and speaker characteristics.
    • Further improvements are needed to enhance the discrimination of spectrally similar vowels.

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