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Encoding voice fundamental frequency into vibrotactile frequency.

M Rothenberg, R D Molitor

    The Journal of the Acoustical Society of America
    |October 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

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    Hearing and deaf individuals can identify English sentence stress using vibrotactile frequency. Reducing voice fundamental frequency (F0) to tactile pulse frequency aids stress pattern discrimination, but slower speech may be needed.

    Area of Science:

    • Auditory Neuroscience
    • Haptics
    • Speech Perception

    Background:

    • Sentence stress is crucial for understanding spoken English.
    • Variations in voice fundamental frequency (F0) convey intonation and stress.
    • The tactile system's capacity to convey auditory information is not fully understood.

    Purpose of the Study:

    • To assess the ability of hearing and deaf individuals to perceive sentence stress via vibrotactile stimulation.
    • To explore optimal transformations of F0 to vibrotactile frequency.
    • To identify limitations of the tactile channel in transmitting prosodic information.

    Main Methods:

    • Eight hearing and five deaf subjects participated.
    • Voice fundamental frequency (F0) variations were transformed into vibrotactile pulse frequency.

    Related Experiment Videos

  • Subjects identified stress patterns presented aurally or through tactile stimulation.

    • Main Results:

    • A 1- or 2-octave F0 reduction to vibrotactile frequency enabled discrimination of moderate-to-strong English sentence stress.
    • Accurate perception of intonation may require slower speech due to a ~200 ms temporal indeterminacy in vibrotactile perception.
    • Deaf subjects showed performance deficits, supporting a link between auditory pitch and vibrotactile frequency perception.

    Conclusions:

    • Vibrotactile feedback of F0 variations can facilitate sentence stress perception.
    • The tactile channel has limitations, particularly temporal resolution, affecting detailed prosody reception.
    • A natural association between auditory pitch and perceived vibrotactile frequency is suggested.