I find this interesting... It sounds like this technique might be a relatively reliable voice sugary.
I have not looked into voce surgeries for many years... Back in my day late 90's - early 2000s) AFAIK there were no reliable voice surgeries... those that I met in person that had some form had what I thought were bad results ( obviously damaged voice, very low volume etc)
But I was desperate, not because my voice was that terrible (i was told the I had a voice that could be taken either way naturally), but to make up for other deficiencies (underwhelming HRT results with a big male bone structure) I felt I had to do anything I could to help blending.
So after listening to the before and after on this web page:
http://members.tripod.com/anony_mous_ts/I gambled on an experimental technique called LAVA - Laser Assisted Voice Adjustment.
I wound up with a but very measurable slight frequency increase - but it was no really noticeable. Ok so it sounds like no harm at least ... but it also lowered the top of my range and I could no longer sing nearly was well as I could before... my voice was less flexible... an I got frequent sore throats
Over time (and unrelated) I developed chronic GERD which seems to have has lowered my voice a bit (or maybe my vocal cords healed some?)
I wish I had not dome it and had the money back I spent on it... Oh well, just as with everything else in life, you do the best you know how and then need to deal with the results, be they good bad or indifferent.
If there is a now a relatively safe and reliable voice sugary for those that need it, that is great!
- Karen