This amazing stuff popped up on MetaFilter - footage from Dr. Christopher Chang, an E.N.T. specialist who deals with various issues associated with the voice.
Start by having a look at this movie of a woman singing glissandi from low to high then high to low. If you want to see more footage, especially of people who have all sorts of issues with their voice - check out this page.
What amazed me is watching how the vocal membranes themselves change with pitch and how athletic the entire vocal mechanism is. Now all we need is to hook up David Lee Roth to the endoscope and get him to give ‘Running With The Devil’ another shot.
As a side note - I used Skitch to get the screen grab you can see above. Total genius - this app rocks and makes stuff like grabbing an image for things like this a total cakewalk!
