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Comparison of maximum flow declination rate: children versus adults
C M Sapienza1, E T Stathopoulos
1State University of New York at Buffalo 14260.
Journal of Voice : Official Journal of the Voice Foundation
|September 1, 1994
Summary
Maximum flow declination rate (MFDR) increases with vocal intensity in all ages. Men exhibit higher MFDR values than women and children, with MFDR location varying by vocal intensity and gender.
Area of Science:
- Speech Science
- Laryngology
- Acoustic Phonetics
Background:
- Understanding the laryngeal mechanism's response to vocal intensity is crucial for speech production.
- Maximum flow declination rate (MFDR) is a key acoustic measure reflecting laryngeal function.
- Investigating MFDR across different vocal intensities, ages, and genders provides insights into speech variability.
Purpose of the Study:
- To analyze the maximum flow declination rate (MFDR) and its location in relation to vocal intensity.
- To examine how gender and age influence MFDR values and location during speech production.
Main Methods:
- Acoustic analysis of speech samples to measure maximum flow declination rate (MFDR).
- Vocal intensity variations (soft, comfortable, loud) were systematically analyzed.
- Data were stratified by age groups (children, adults) and gender (men, women).
Main Results:
- MFDR values increased with rising vocal intensity across all participants.
- Adult men demonstrated higher MFDR values compared to adult women and children.
- MFDR location was highest during loud vocalizations and higher in women than men.
Conclusions:
- Vocal intensity significantly impacts MFDR, reflecting adaptive laryngeal adjustments.
- Gender differences in MFDR suggest distinct laryngeal biomechanics in men and women.
- Age and gender are important factors in understanding variations in speech production dynamics.