Abstract
In a series of experiments aimed at identifying factors that influence speech perception by cochlear implant (CI) users, we are currently investigating the reception and utilization of relevant perceptual information available in monosyllables and steady‐state vowels. Normal‐hearing subjects and adults fitted with Clarion and Nucleus cochlear implant (CI) devices provided identification responses to both natural and synthetic speech. The first experiment examines intelligibility differences of a standard word identification test (NU‐6) recorded in three different contexts by two talkers (male/female): (1) individual words spoken in typical citation format, and the same words excised from a narrative read at (2) a typical rate and (3) a rapid rate. The second experiment demonstrates the potential diagnostic value afforded from mapping the acoustic vowel space using steady‐state synthetic tokens. The last experiment explores the effects of harmonic richness and first formant (F1) emphasis on synthetic vowel identification by creating tokens varying only in F0, such that a harmonic of F0 would coincide with the F1 center frequency in (1) a male (harmonically rich) F0 and (2) a female (harmonically sparse) F0 range, and (3) an intermediate F0 which was harmonically noncoincident with F1. [Work supported by OSU Office of Research.]
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