A Comparison of Selected Phonatory Behaviors of Healthy Aged and Young Adults Selected phonatory behaviors of healthy aged and young men and women were compared. Inverse-filtered air flow, electroglottograph (EGG), and intraoral air pressure signals were recorded as subjects phonated in each of four conditions: normal, soft, loud, loud/high pitched. Minimum flow offset, flow amplitude, air flow duty cycle, EGG duty cycle, ... Research Article
Research Article  |   October 01, 1991
A Comparison of Selected Phonatory Behaviors of Healthy Aged and Young Adults
 
Author Affiliations & Notes
  • Maureen B. Higgins
    Communication Sciences and Disorders Syracuse University
  • John H. Saxman
    Communication Sciences and Disorders Syracuse University
  • Requests for reprints should be sent to Maureen B. Higgins, PhD, Boys Town National Research Hospital, 555 North 30th Street, Omaha, NE 68131.
  • Currently affiliated with the Boys Town National Research Hospital, Omaha, NE.
    Currently affiliated with the Boys Town National Research Hospital, Omaha, NE.×
Article Information
Speech, Voice & Prosody / Speech / Research Articles
Research Article   |   October 01, 1991
A Comparison of Selected Phonatory Behaviors of Healthy Aged and Young Adults
Journal of Speech, Language, and Hearing Research, October 1991, Vol. 34, 1000-1010. doi:10.1044/jshr.3405.1000
History: Received May 30, 1990 , Accepted December 2, 1990
 
Journal of Speech, Language, and Hearing Research, October 1991, Vol. 34, 1000-1010. doi:10.1044/jshr.3405.1000
History: Received May 30, 1990; Accepted December 2, 1990

Selected phonatory behaviors of healthy aged and young men and women were compared. Inverse-filtered air flow, electroglottograph (EGG), and intraoral air pressure signals were recorded as subjects phonated in each of four conditions: normal, soft, loud, loud/high pitched. Minimum flow offset, flow amplitude, air flow duty cycle, EGG duty cycle, estimated subglottal pressure, and fundamental frequency were derived from the recorded signals and compared among age/gender groups. Males had significantly greater flow amplitude than females regardless of age. Significant Age x Sex interactions were found for fundamental frequency and duty cycle measures. Duty cycles and fundamental frequency increased for males and decreased for females with aging. For the normal phonatory condition, aged men had significantly greater duty cycle measures, flow amplitude, and estimated subglottal pressure than young men. There were significant differences in fundamental frequency and EGG duty cycle between aged and young women during normal phonation. It was concluded that the effects of aging on phonatory behaviors are different in degree and kind for men and women. Fewer significant age-related differences in phonatory measures for women than men were consistent with reports of less age-related laryngeal degeneration in females than males.

Acknowledgments
This research was based on a doctoral dissertation completed at Syracuse University by author Higgins. Portions of this paper were presented at the Annual Convention of the American Speech-Language-Hearing Association in St. Louis, MO, November 1989. The authors gratefully acknowledge Drs. Raymond Cotton, Edward Conture, and Martin Rothenberg for their assistance throughout this project. Special thanks are expressed to Dr. Rothenberg for use of his laboratory for data collection and analysis. Ronald Netsell and Susan Nittrouer provided many helpful comments on an earlier version of this manuscript. This study was funded in part by the Graduate School of Syracuse University.
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