1. The Effect of an Artificially Lengthened Vocal Tract on Estimated Glottal Contact Quotient in Untrained Male Voices 
Christopher S. Gaskill, Molly L. Erickson 
Journal of Voice 
Volume 24, Issue 1, Pages (January 2010)
DOI: /j.jvoice
Copyright © 2010 The Voice Foundation Terms and Conditions

2. Figure 1
Impedance curves for a uniform tube of 3cm2 cross-sectional area and 17.5cm length. Reprinted from Story et al.2 Used with permission from The Voice Foundation.
Journal of Voice  , 57-71DOI: ( /j.jvoice )
Copyright © 2010 The Voice Foundation Terms and Conditions

3. Figure 2
Reactance curves for bilabial occlusion, and vocal tract extension tubes of 50 and 100cm. Reprinted from Story et al.2 Used with permission from The Voice Foundation.
Journal of Voice  , 57-71DOI: ( /j.jvoice )
Copyright © 2010 The Voice Foundation Terms and Conditions

4. Figure 3
Calculation of glottal CQ from the EGG waveform using a 25% peak-to-peak algorithm.
Journal of Voice  , 57-71DOI: ( /j.jvoice )
Copyright © 2010 The Voice Foundation Terms and Conditions

5. Figure 4
Box plots of the mean CQ across all 15 participants for each phase of the experiment.
Journal of Voice  , 57-71DOI: ( /j.jvoice )
Copyright © 2010 The Voice Foundation Terms and Conditions

6. Figure 5 Control chart for participants with baseline 6.
Journal of Voice  , 57-71DOI: ( /j.jvoice )
Copyright © 2010 The Voice Foundation Terms and Conditions

7. Figure 6 Control chart for participants with baseline 9.
Journal of Voice  , 57-71DOI: ( /j.jvoice )
Copyright © 2010 The Voice Foundation Terms and Conditions

8. Figure 7 Control chart for participants with baseline 12.
Journal of Voice  , 57-71DOI: ( /j.jvoice )
Copyright © 2010 The Voice Foundation Terms and Conditions

9. Figure 8
Resistance curves for bilabial occlusion, and vocal tract extension tubes of 50 and 100cm. Reprinted from Story et al.2 Used with permission from The Voice Foundation.
Journal of Voice  , 57-71DOI: ( /j.jvoice )
Copyright © 2010 The Voice Foundation Terms and Conditions