There is a review on bone conduction sound:
Stenfelt and Goode. Bone-conducted sound: Physiological and clinical aspects. Otol Neurotol (2005) vol. 26 (6) pp. 1245-1261
The following study suggests that bone conduction sound dominates perception of a person's own voice for frequencies between 700 Hz and 1200 Hz.
Pörschmann. Influences of Bone Conduction and Air Conduction on the Sound of One's Own Voice. Acta Acustica united with Acustica (2000)
On Apr 9, 2009, at 8:44 PM, Hornsby, Benjamin Wade Young wrote: