Unlike 1, this isn’t completely implausible, but it seems like a very ambitious claim.
Not really. To adjust frequency you just need to 1) adjust air resonance by changing length or 2) mechanical resonance by changing tension. (1) might be too slow here but (2) is not.
This is handwaving. To make such a claim, you need reference to the mechanism or at least the anatomy. As a source, sperm whales don’t have a larynx, but they have phonic lips. As a filter, they don’t have tongues or lips or throats in the way we do, but they have a distal air sac. Is that what they’re “changing the length” of ? Is that what they’re “changing the tension” of?
Not really. To adjust frequency you just need to 1) adjust air resonance by changing length or 2) mechanical resonance by changing tension. (1) might be too slow here but (2) is not.
This is handwaving. To make such a claim, you need reference to the mechanism or at least the anatomy. As a source, sperm whales don’t have a larynx, but they have phonic lips. As a filter, they don’t have tongues or lips or throats in the way we do, but they have a distal air sac. Is that what they’re “changing the length” of ? Is that what they’re “changing the tension” of?