14thAnnual Conference of the International Speech Communication Association

Lyon, France
August 25-29, 2013

Is Protrusion of French Rounded Vowels Affected by Prosodic Positions?

Laurianne Georgeton, Nicolas Audibert

LPP (UMR 7018), France

This paper examines whether lip protrusion is affected by initial strengthening of rounded vowels in French. Three speakers produced sentences containing the vowels /i, e, E, a, y, o, oe, u, o, O/ at the beginning of different prosodic constituents: Intonational Phrase (IP), Accentual Phrase (AP) and Word (W). Using video and Qualisys motion capture data, three parameters (lip protrusion, area/lip protrusion and lip protrusion/area) are compared to characterize the labial configuration, first between [.round] and [+round] vowels, then within [+round] vowels. These three parameters are found to discriminate between [+/.rounded], to reflect some within category distinction and to show speaker-specific labial patterns. Concerning the effect of prosodic boundary, only the combined measurement of lip protrusion/area reveals a speaker dependent effect on prosodic boundaries. Two speakers out of three show a tendency to decrease lip protrusion/area in IP initial position for back rounded vowels (/o/ and /O/) and for /y/. Prosodic boundary effects are discussed in terms of feature enhancement.

Full Paper

Bibliographic reference.  Georgeton, Laurianne / Audibert, Nicolas (2013): "Is protrusion of French rounded vowels affected by prosodic positions?", In INTERSPEECH-2013, 3547-3551.