Related Experiment Videos
The effect of frequency on combined glottography
G E Murty1, P N Carding, P J Kelly
1Department of ENT, Freeman Hospital, Newcastle upon Tyne, UK.
Clinical Otolaryngology and Allied Sciences
|June 1, 1991
Summary
This study found that voice measures like open quotient (OQ) and speed quotient (SQ) are not affected by vocal frequency. This confirms the reliability of combined glottography techniques for voice analysis.
Area of Science:
- Laryngology
- Speech Science
- Acoustic Analysis
Background:
- Combined glottography, integrating electroglottography (EGG) and photoglottography (PGG), is used to assess vocal fold function.
- Understanding the influence of fundamental frequency on key glottographic parameters is crucial for accurate interpretation.
Purpose of the Study:
- To investigate the relationship between voice frequency and the open quotient (OQ) and speed quotient (SQ) derived from combined glottography.
- To determine if frequency variations impact the validity of OQ and SQ measurements.
Main Methods:
- Simultaneous electroglottography and photoglottography were employed.
- Data were collected from 20 healthy male participants.
- Regression analysis was used to assess the relationship between frequency and OQ/SQ.
Main Results:
- Regression analysis revealed no significant dependency of open quotient (OQ) on voice frequency.
- Similarly, speed quotient (SQ) was found to be independent of voice frequency.
- These findings indicate frequency is not a confounding variable for these measures.
Conclusions:
- Combined glottography measures, specifically OQ and SQ, are robust and not influenced by changes in vocal frequency.
- The technique's validity is maintained even when vocal frequency cannot be controlled, supporting its use in diverse voice assessment scenarios.