The perception experiment presented here aims at determining the perceptual relevance of potentially 'faulty' prosodic traits which appeared salient in the acoustic analysis of French-accented English. The evaluation results for filtered and resynthesised speech seem to credit the hypothesis of a globally significant role played by prosody in the perception of French-accent. If F0 variations appear to be a sufficient cue for accent detection when combined with rythmic patterns, they are not necessary and seem to be compensated by remaining parameters when neutralised. The overall results seem to point towards the perceptually determining role of non-native rhythmic patterns in French-accented English.Le test de perception présenté dans cet ...