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Mean pharyngeal volume (cm3) by place of fricative articulation. All four subjects and all three vowel contexts. Percentage difference calculated as (Vvoiced−Vunvoiced)∕Vunvoiced×100.
| Place of articulation | Volume voiced | Volume unvoiced | Difference | |
|---|---|---|---|---|
| cm3 | % | |||
| Labiodental | 26.9 | 20.2 | 6.7 | 33 |
| Dental | 22.9 | 19.5 | 3.4 | 18 |
| Alveolar | 34.3 | 23.0 | 11.4 | 49 |
| Postalveolar | 33.1 | 23.7 | 9.3 | 39 |
| All fricatives | 29.3 | 21.6 | 7.7 | 36 |
