In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 107, No. 5_Supplement ( 2000-05-01), p. 2886-2887
Abstract:
Cochlear implant (CI) users show substantial individual differences in their ability to understand speech in general, and vowels in particular. These differences may result from widely different abilities in identifying formant frequencies or in adapting to the more basal than normal spectral information presented by the implant. In this study, we administered a vowel perception test, using a method-of-adjustment (MOA) paradigm, to 8 CI users and 43 normal-hearing listeners. The MOA vowel test consisted of 330 steady-state synthetic vowel stimuli, varying in F1 and F2, arranged in a visual two-dimensional grid. Subjects were asked to label and rate on a 7-point scale those stimuli that matched the vowels contained in ten visually-presented words, ‘‘heed,’’ ‘‘hid,’’ ‘‘aid,’’ ‘‘head,’’ ‘‘had,’’ ‘‘hut,’’ ‘‘odd,’’ ‘‘whod,’’ ‘‘hood,’’ ‘‘owed,’’ and ‘‘odd.’’ Plots of subjects’ responses for all ten words constituted the vowel spaces of the subjects. With one exception, no systematic shift was observed across all vowel categories of CI users, suggesting that these subjects were able to adapt completely to the spectral shift introduced by the implant. However, the CI users’ spaces differed substantially from normal vowel spaces in terms of the relative size of the vowel categories and their location in perceptual space.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2000
detail.hit.zdb_id:
1461063-2
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