Intraclick and intracoda are very different timescales from a quick Google. Intra-click would indeed be ms-scale, but intra-coda seems like it would be 10s or 100s of ms, which is well within possibility.
I think the stronger evidence that it’s false comes from the fact that the two vowels differ in undertones rather than overtones, which is unlike human vowels (not sure about bird vowels).
The intraclick and intracoda “adjustment by muscles” is precisely what I’m disputing.
Intraclick and intracoda are very different timescales from a quick Google. Intra-click would indeed be ms-scale, but intra-coda seems like it would be 10s or 100s of ms, which is well within possibility.
I think the stronger evidence that it’s false comes from the fact that the two vowels differ in undertones rather than overtones, which is unlike human vowels (not sure about bird vowels).
As I noted elsewhere in these comments, the intracoda timescale is borderline as well, and would rival human abilities. A huge claim.
I hadn’t considered the overtone issue. I need to think about that…