Related Experiment Video

Updated: Aug 16, 2026

Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy
09:18

Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy

Published on: January 12, 2019

Aerodynamic measurements: normative data for children ages 6:0 to 10:11 years

Barbara Weinrich1, Beth Salz, Michael Hughes

  • 1Department of Speech Pathology and Audiology, Miami University, Oxford, OH 45056, USA. weinribd@muohio.edu

Journal of Voice : Official Journal of the Voice Foundation
|August 17, 2005
PubMed

Insights

This study found no significant differences in aerodynamic measures like open quotient and speed quotient across different vocal pitches in children. Age and sex also did not significantly impact these vocal aerodynamics.

Area of Science:

  • Speech-Language Pathology
  • Pediatric Voice Science
  • Aerodynamics of Speech

Background:

  • Understanding vocal aerodynamics in children is crucial for diagnosing and treating voice disorders.
  • Normative data for aerodynamic measures across different vocal tasks and pitches in children are limited.
  • Previous research has not extensively explored the impact of pitch variation on vocal aerodynamics in pediatric populations.

Purpose of the Study:

  • To establish normative aerodynamic measures (open quotient, speed quotient, maximum flow declination rate, subglottal pressure) in children aged 6-10 years.
  • To investigate the effect of vocal frequency (low, comfort, high pitches) on these aerodynamic measures.
  • To examine potential influences of age and sex on vocal aerodynamics across different pitches.

Main Methods:

  • Seventy-five children (ages 6-10) participated in the study.
  • Participants produced sustained /a/ vowels and /pa/ syllable repetitions at low, comfort, and high pitches.
  • Aerodynamic variables including open quotient, speed quotient, maximum flow declination rate (MFDR), and subglottal pressure were measured.

Main Results:

  • No statistically significant differences were observed in mean aerodynamic measures across low, comfort, and high pitches.
  • Age and sex did not show a significant effect on aerodynamic measures across different vocal frequencies.
  • Slight increases in mean open quotient, MFDR, and subglottal pressure were noted from low to high pitches for sustained /a/ vowels.

Conclusions:

  • Vocal pitch variations within the tested range do not significantly alter core aerodynamic measures in children aged 6-10.
  • Normative aerodynamic data for children can be considered relatively stable across common pitch variations.
  • Further research may explore more extreme pitch ranges or different vocal tasks to understand pediatric vocal aerodynamics comprehensively.

More Related Videos

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults06:11

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults

Published on: February 9, 2022

Related Concept Videos

Applications of Normal Distribution01:22

Applications of Normal Distribution

The normal distribution is a useful statistical tool. One of its practical applications is determining the door height after considering the normal distribution of heights of persons, such that many can pass through it easily without striking their heads. The normal distribution can also determine the probability of a person having a height less than a specific height.
The heights of 15 to 18-year-old males from Chile from 1984 to 1985 followed a normal distribution. The mean height is 172.36...
Variation: Normal Distribution, Range, and Standard Deviation02:32

Variation: Normal Distribution, Range, and Standard Deviation

In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
Design Example: Calculating Safe Diameter for Wind-Exposed Disc01:17

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
Correlation of Experimental Data01:23

Correlation of Experimental Data

Dimensional analysis simplifies complex physical problems and guides experimental investigations, but it does not provide complete solutions. It identifies the dimensionless groups that influence a phenomenon, but experimental data is needed to establish the specific relationships and validate theoretical predictions.
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity, and...