Rosen, STUART

Zhang, Y

UCL Discovery

The effect of acoustic cue-weighting strategy on listening effort in acousticsimulations of cochlear implantsZhang, Yue and Rosen, StuartSpeech, Hearing and Phonetic SciencesUniversity College London'&$%Abstract: This study examined the relation between listening effort and speech comprehension level of cochlear implant (CI) acoustic simulations at different levels of perceptual difficulty, and whetherlisteners’ acoustic cue-weighting strategies affected the behavioural gain from increase in cognitive effort.'&$%Background• Big individual differences in speech comprehension and life quality for CI fitting outcomes• Listeners’ temporal and spectral cue-weighting patterns affect speech comprehension andmight also affect listening effort'&$%Testing Procedure• 14 normal hearing native Southern British English speakers, all stimuli 8-band 4-mm frequency-shifted and noise-vocodedProcessed CAL sentences in quiet to determine individual best performance levelSRT tests in noise tracking 40% of individualperformance levelSRT tests in noise tracking 80% of individualperformance levelFixed SNR CAL sentences tests at either SNR40% or SNR80% with pupillary and verbal responses recordedWord discrimination test using /i/-/I/ continuum with orthogonally paired duration and spectral valuesbit beatUnprocesseddurfreq = 0.0440.000.250.500.751.000mm1 2 3 4 5 6Step in Frequency Ratio/DurationCorrectfreq_slope   /  dur_slopecue-weighting coefficient =Step in Duration/Spectral ValueCorrect'&$%AnalysisMixed effect models using R package lme4 with fixed effects: pupillary responses (peak, mean, la-tency), individual cue-weighting coefficients, condition (easy SNR80% and hard SNR40%), sen-tence correct levels and random effect listener and sentence'&$%Results & DiscussionSNR40% − hard SNR80% − easy0.000.250.500.751.000.0 0.3 0.6 0.0 0.3 0.6Baseline Corrected Mean Pupil Size/mmCorrectMore reliance on spectral cue More reliance on durational cue• For listeners weighting more on spectral cues, expending more cognitive effort was associated withbetter degraded speech perception performance.• Listeners were more efficient in using explicit cognitive effort to enhance degraded speech percep-tion performance when perceptual difficulty level was low.Address: Chandler House, 2 Wakefield Street, London, UK, WC1N 1PFEmail: yue.zhang.12@ucl.ac.uk, stuart@phon.ucl.ac.uk

The Effect of Acoustic Cue-weighting Strategy on Listening Effort in Acoustic Simulations of Cochlear Implants

http://discovery.ucl.ac.uk/1497129/1/poster.pdf

The Effect of Acoustic Cue-weighting Strategy on Listening Effort in Acoustic Simulations of Cochlear Implants

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