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Vibrotactile frequency for encoding a speech parameter

M Rothenberg, R T Verrillo, S A Zahorian

    The Journal of the Acoustical Society of America
    |October 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

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    Vibratory frequency can convey speech information on the skin. Researchers suggest adapting the frequency range to better match the skin's tactile capabilities for optimal speech encoding.

    Area of Science:

    • Auditory Neuroscience
    • Haptics
    • Speech Processing

    Background:

    • Vibration frequency is an underutilized parameter for encoding speech on the skin.
    • Previous studies used frequencies not optimized for tactile perception.
    • Tactile frequency discrimination may be sufficient for encoding speech parameters like fundamental frequency.

    Purpose of the Study:

    • To assess frequency discrimination ability of the volar forearm for tactile speech encoding.
    • To investigate the use of constant and frequency-modulated (warbled) vibrations.
    • To determine the potential of vibratory frequency to represent speech's fundamental frequency.

    Main Methods:

    • Measured human forearm vibration frequency discrimination.
    • Utilized sinusoidal and pulse waveforms.

    Related Experiment Videos

  • Employed constant-frequency and frequency-modulated (warbled) stimulus patterns.

    • Main Results:

    • Demonstrated that vibratory frequency can encode speech-derived information.
    • Warbled stimulus temporal variations mimicked speech patterns.
    • Skin's frequency discrimination capabilities are relevant for this application.

    Conclusions:

    • Vibratory frequency is a viable channel for displaying speech's fundamental frequency on the skin.
    • Recoding fundamental frequency to a skin-optimized range may enhance transmission.
    • Further research can refine tactile speech encoding using vibration frequency.