4th International Conference on Spoken Language Processing
Philadelphia, PA, USA
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 F0 rises in only 71% of 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.
Bibliographic reference. Cavé, Christian / Guaïtella, Isabelle / Bertrand, Roxane / Santi, Serge / Harlay, Françoise / Espesser, Robert (1996): "About the relationship between eyebrow movements and F0 variations", In ICSLP-1996, 2175-2178.