Yesterday ("Pinker peace creak") I followed up on Breffni's reference to vocal fry/creak in the speech of the young woman who introduces Steven Pinker's talk at the 2015 Nobel Peace Prize Forum. And indeed, in her first 40 words (16 seconds of audio, 8.3 seconds of voiced speech, 1,653 f0 estimate) I found three clear examples of phrase-final period-doubling.
But then, for a bit of balance, I took a look at the start of Pinker's talk — and found three clear examples of phrase-final period doubling in his first 21 words (12 seconds of audio, 5.2 seconds of voiced speech, 1048 f0 estimates).
Since the introducer does seem to exhibit the period-doubling phenomenon in a more striking way, I ended by wondering what the source of this perceptual difference is. But instead, I should have looked at a little more data, which would have clarified the situation, and suggested a way forward.
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