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The Neural Representation of Consonant-Vowel Transitions in Adults Who Wear Hearing Aids

Department of Speech and Hearing Sciences, University of Washington, Seattle, Washington, tremblay{at}u.washington.edu

Laura Kalstein, MS

Colorado Hearing and Balance Clinic, Colorado Springs, Colorado

Curtis J. Billings, MS

Department of Speech and Hearing Sciences, University of Washington, Seattle, Washington

Pamela E. Souza, PhD

Department of Speech and Hearing Sciences, University of Washington, Seattle, Washington

Hearing aids help compensate for disorders of the ear by amplifying sound; however, their effectiveness also depends on the central auditory system’s ability to represent and integrate spectral and temporal information delivered by the hearing aid. The authors report that the neural detection of time-varying acoustic cues contained in speech can be recorded in adult hearing aid users using the acoustic change complex (ACC). Seven adults (50-76 years) with mild to severe sensorineural hearing participated in the study. When presented with 2 identifiable consonant-vowel (CV) syllables ("shee" and "see"), the neural detection of CV transitions (as indicated by the presence of a P1-N1-P2 response) was different for each speech sound. More specifically, the latency of the evoked neural response coincided in time with the onset of the vowel, similar to the latency patterns the authors previously reported in normal-hearing listeners.

Key Words: P1-N1-P2 complex • N100 • auditory evoked potentials (AEP) • hearing aids • cortical auditory evoked potentials (CAEP) • amplification • event-related potentials (ERP) • acoustic change complex (ACC)

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