title: The effect of intensity on pitch in electric hearing and its relationship to the speech perception performance of cochlear implantees.
abstract: This study investigated the effect of intensity on pitch in electric hearing and its relationship to the speech perception ability of cochlear implantees. Subjects were 13 adult users of the Nucleus 22 cochlear implant system, using either the Spectra22 or ESPrit22 speech processor and the SPEAK speech processing strategy. A multidimensional scaling technique was employed. Speech perception was measured using sentences and vowels. All measurements were performed in a soundfield condition, and subjects wore their own speech processors with their normally used settings. Results showed a significant correlation between the degree of deviation of the subjects' stimulus spaces from the "ideal" space and subjects' performance with the sentences, but not with the vowels. A significant correlation was found between subjects' response variability in performing the multidimensional scaling task and their speech perception measures, suggesting that spectral smearing or underlying cognitive abilities might affect implantees' speech perception performance.
authors.affiliation: Department of Audiology and Speech Sciences, Faculty of Allied Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia. cilajasp@yahoo.com
authors.forename: Cila
authors.initials: C
authors.lastname: Umat
authors.forename: Hugh J
authors.initials: HJ
authors.lastname: McDermott
authors.forename: Colette M
authors.initials: CM
authors.lastname: McKay
mesh_terms: D000161:Acoustic Stimulation; D000368:Aged; D003054:Cochlear Implants; D003638:Deafness / Q000532:radiotherapy*; D005260:Female; D006801:Humans; D008144:Loudness Perception; D008297:Male; D008875:Middle Aged; D010897:Pitch Discrimination; D012044:Regression Analysis; D013067:Speech Perception; D013069:Speech Reception Threshold Test; D016896:Treatment Outcome