About the relationship between eyebrow movements and Fo variations

C. Cave, I. Guaitella, R. Bertrand, S. Santi, F. Harlay, R. Espesser
Proceeding of Fourth International Conference on Spoken Language Processing. ICSLP '96  
Speech production is always accompanied by facial and gestural activity. The present study is part of a broader research project on how head movements and facial expressions are related to voice variations in different speech situations. Ten normal subjects were recorded while reading aloud, answering yes/no questions, and dialoguing with an interviewer. Rapid rising-falling eyebrow movements produced by the subjects as they spoke were associated with Fo rises in only 71% of the cases. This
more » ... the cases. This suggests that eyebrow movements and fundamental frequency changes are not automatically linked (i.e., they are not the result of muscular synergy), but are more a consequence of linguistic and communicational choices. Note also that 38% of the eyebrow movements were produced while the subject was not speaking. Thus, eyebrow movements may also serve as back-channel signals or play a role in turn-taking during conversation.
doi:10.1109/icslp.1996.607235 fatcat:5rf6pqra4vgerepi7jgmfnn4sy