Chimpanzees Have no Expanded Formant Space and No Correlated F1 and F2: A Comment on Grawunder et al. (2021)
Résumé
We enthusiastically support investigations of human speech emergence through vocalizations of living primates, as in Grawunder et al. (2021), but we seriously doubt their supplement's formant data, which we believe reveals substantial errors. These errors invalidate the surprising main claims in the paper: F1-F2 correlation and formant space expansion through extreme F1s and F2s.
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