Prior knowledge and semantic coherence make degraded speech seems clearer for hearing-impaired listeners
2015 (English)In: Abstract book: Third International Conference on Cognitive Hearing Science for Communication, 2015, 180-180 p.Conference paper, Poster (Other academic)
Recent work1 suggests that semantic information enhances processing of degraded speech for hearing-impaired (HI) listeners. Based on results from our lab2 showing that prior knowledge influences the perceptual clarity of degraded speech more when semantic coherence is low for normal-hearing listeners, we predicted a similar effect for HI listeners. We investigated here whether prior knowledge enhances the perceived clarity of degraded speech for HI listeners and whether this effect is dependent on semantic coherence. Native Swedish speakers with moderate sensory hearing-loss listened to spoken Swedish sentences that were either clear or degraded by noise-vocoding, and rated their clarity on a 7-point scale. The sentences were semantically high or low coherent. Each spoken word was preceded (200 ms) by either its text equivalent (matching cue) or a consonant string of matched length (non-matching cue). Preliminary results from 8 participants showed that the perceived clarity of degraded sentences was greater when they were coherent, F(1,7) = 6.54; p = .038, and when they were preceded by a matching cues, F(1,7) = 29.96; p < .001. A marginal Cue x Coherence interaction, F(1,7) = 5.16; p = .057, surprisingly indicated that the prior knowledge provided by cues influenced the perceptual clarity of degraded sentences more when coherence was high for HI listeners. Correlations between clarity ratings and independent measures of cognitive abilities will be reported to advance our knowledge of factors that can promote and optimize degraded speech perception for persons with age-related hearing loss.
Place, publisher, year, edition, pages
2015. 180-180 p.
IdentifiersURN: urn:nbn:se:liu:diva-123964OAI: oai:DiVA.org:liu-123964DiVA: diva2:894520
Third International Conference on Cognitive Hearing Science for Communication (CHSCOM2015), Linköping, Sweden, 14–17 June 2015