Great video. I didn't really understand what kind of true vocal fold closure should be present in head voice or falsetto in your model. Does falsetto in your terminology correspond to the same as in Estill-which I think is stiff vocal fold body cover? And does head voice have thin edge body cover?
No, the difference in my model is about acoustics. You can do falsetto with stiff folds or thin folds, or something in between, and same with head register.
