The microscopic impact of noise on phoneme perception and some implications for the nature of phonetic cues

titleThe microscopic impact of noise on phoneme perception and some implications for the nature of phonetic cues
start_date2025/07/09
schedule10h
onlineno
location_infoamphi Jean-Jacques Gagnepain
summaryThe effect of background noise on speech perception is a multifaceted phenomenon. Psycholinguists often attribute the reduced intelligibility in noise to energetic masking: weak elements of the speech signal are not audible anymore and cannot contribute to recognition. However, the addition of randomness in the signal also contributes to the deleterious effect of noise. Adopting a reverse correlation approach, we explored how trial-by-trial variations in noise enveloppe influence phoneme categorization. This method revealed that noise not only masks but also interacts with phonetic cues in systematic ways, a phenomenon that we termed « microscopic effect of noise ». By focusing on this phenomenon, we obtained new insights into the hierarchical structure of mental representations of phonemes.
responsiblesAucouturier, Villain