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Age and changes in vocal jitter

K A Wilcox, Y Horii

    Journal of Gerontology
    |March 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Older adults exhibit significantly higher vocal jitter, indicating age-related voice changes. This finding may aid in the early detection of laryngeal dysfunction.

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    Area of Science:

    • Speech and Hearing Science
    • Gerontology
    • Acoustic Analysis

    Background:

    • Vocal jitter, small cycle-to-cycle variations in voice fundamental frequency, is a sensitive measure of voice quality.
    • Aging can affect laryngeal structures and neuromuscular control, potentially impacting voice production.
    • Understanding age-related vocal changes is crucial for distinguishing normal aging from pathological conditions.

    Purpose of the Study:

    • To investigate age-related differences in vocal jitter during sustained vowel phonations.
    • To compare vocal jitter between young and older adult populations.
    • To explore the relationship between vowel type and jitter magnitude in different age groups.

    Main Methods:

    • Sustained phonations of vowels /i/, /a/, and /u/ were recorded from 20 young and 20 older adults.

    Related Experiment Videos

  • An automatic fundamental frequency tracking program employing a peak-picking method was used to measure vocal jitter.
  • Statistical analyses were conducted to compare jitter values between age groups and across vowels.

    • Main Results:

    • Older adults demonstrated significantly greater average vocal jitter compared to young adults.
    • Significant differences in jitter magnitudes were observed among the vowels /i/, /a/, and /u/.
    • Vocal jitter analysis revealed distinct acoustic signatures associated with aging.

    Conclusions:

    • The findings suggest that increased vocal jitter is a characteristic of aging in voice production.
    • Elevated jitter in older adults may serve as an indicator for potential laryngeal dysfunction.
    • Acoustic voice analysis, specifically jitter measurement, holds promise for early detection of age-related laryngeal changes.