An examination of elicitation method on fundamental frequency and repeatability of average airflow measures in children age 4:0-5:11 years.

Objective: The purpose of this study was to determine the effect of task type on fundamental frequency (F(0)) and the short-term repeatability of average airflow values in preschool/kindergarten-age children.

Study Design: Prospective, experimental.

Methods: Thirty healthy children (age 4.