What procedure is it? Glottoplasty as with Dr Kim and a few others, CTA as with some others in the US or Germany, something more invasive as with Dr Thomas? If if requires no voice training at all, it sould have to be the latter as with all other techniques some sort of voice training is inevitable to get resonance and some other parameters changed. And you always need to get used to the new voice anyways. I think with CTA you can rather soon just get going again and dont need much voice training regarding the surgery itself, althoug it seems many have the problem that as it only raises pitch, it may sound still odd and they do voice training anyways to get those other things changed. I had the impression about CTA that the voices sound stressed though.
CTA means, they basically tighten the vocal chords, glottoplasty shortens them by seqing them together and Dr Thomas is IMO the only one who tries a complete reconstruction of the larynx including resonance space and such.
So it would be interestin to know what technique he uses, how many people he has operated upon in total and if there are any english or european language examples availabe.