Abstract
1. Introduction
2. Methods
2.1. Speech Materials
2.2. Participants and Procedure
2.3. Acoustic and Statistical Analysis
3. Results and Discussions
3.1. Consonant and Phonation Type Effects
3.2. Vowel Effects on Spectral Peak Frequency
3.3. Gender Effect on Spectral Peak Frequency
3.4. Age and Gender Effects on Spectral Peak Frequency
4. Conclusion and Summary
References