Quoting Mark Jones <markjjones@...>:
[snip]
> To transcribe this more open trill sound, you could use the IPA symbol for
> the apical trill, i.s. [r], with the subscript 'more open' diacritic (looks
> like a small capital T).
Thanks!
> One final thing: research suggests that apical trills are made in the same
> way as the vibration of the vocal folds - not individual neuromuscular
> commands for each contact, but an essentially aerodynamically driven
> vibration
To be perfectly honest, I was under the impression that trills were
aerodynamically driven by definition. Intuitively I'd say achieving them any
other way is impossible.
Andreas