Journal
NEUROREPORT
Volume 13, Issue 13, Pages 1635-1639Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200209160-00013
Keywords
cochlear implant; modulation detection threshold; phoneme recognition; temporal processing
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Funding
- NIDCD NIH HHS [R01-DC04993, R03-DC-03861] Funding Source: Medline
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Although the speech recognition performance of cochlear implant patients has steadily improved in recent years, considerable variability remains in implant patient outcomes. Here, we report on a correlation between cochlear implant patients' auditory temporal processing and speech recognition abilities. Modulation detection thresholds were measured as a function of stimulation level; phoneme recognition was also assessed. Results showed marked individual differences in the shape and absolute sensitivity of subjects' modulation threshold functions. Statistical analysis revealed a strong correlation between phoneme recognition scores and subjects' mean modulation thresholds, demonstrating the contribution of temporal processing to implant speech perception. In correlating a basic psychophysical measure to speech performance, these results should contribute toward improved speech processor design and rehabilitation tools for cochlear implant patients.
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