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Perception and production of /r/ allophones improve with hearing from a cochlear implanta)
a)A portion of this work was presented at the 150th meeting of the Acoustical Society of America in Minneapolis, MN, Fall, 2005.
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10.1121/1.2987427
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    Affiliations:
    1 Department of Speech Language and Hearing Sciences, Boston University, Boston, MA 02215 and Speech Communication Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
    2 Department of Cognitive and Neural Systems, Boston University, Boston, MA 02215-0000 and Speech Communication Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
    3 Speech Communication Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
    4 Speech Communication Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139; Department of Cognitive and Neural Systems, Boston University, Boston, MA 02215; and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
    5 Speech Communication Group, Research Laboratory of Electronics,Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
    6 Department of Speech and Hearing Sciences, University of Washington, and Speech Communication Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
    7 Department of Psychology, Northeastern University, Boston, MA and Speech Communication Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
    8 Speech Communication Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 and Haskins Laboratories, New Haven, CT 06511
    9 Speech Communication Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 and Department of Cognitive and Neural Systems, Boston University, Boston, MA 02215
    J. Acoust. Soc. Am. 124, 3191 (2008); http://dx.doi.org/10.1121/1.2987427
/content/asa/journal/jasa/124/5/10.1121/1.2987427
http://aip.metastore.ingenta.com/content/asa/journal/jasa/124/5/10.1121/1.2987427

Figures

Image of FIG. 1.
FIG. 1.

Schematized formant tracks that depict measurements taken during the vowel, from the consonant-vowel boundary (dotted line) through the midvowel, and how these were used for analyses.

Image of FIG. 2.
FIG. 2.

A comparison of F3 transition data for wadrav (likely to be retroflexed) and wagrav (likely to be bunched) as a function of experience with the cochlear implant for participant ML.

Image of FIG. 3.
FIG. 3.

Schematized comparison of a small variability index (lower panels) with a larger variability index (upper panels) due to greater /r/ dispersion in the upper right-hand plot. The /r/ dispersion is plotted in the domain of the difference at the beginning of the vowel by the F3 transition from vowel beginning to midvowel. The vowel dispersion is plotted in the F1, F2 domain.

Image of FIG. 4.
FIG. 4.

Proportion correct from 11-item consonant confusion matrices constructed from results of consonant identification (12 repetitions per consonant) at a comfortable listening level.

Image of FIG. 5.
FIG. 5.

Results of discriminant analyses of speakers’ productions of /b/, /d/, and /g/.

Image of FIG. 6.
FIG. 6.

A comparison of singleton stops (open symbols) vs tokens (closed, filled symbols) for a normal-hearing speaker with auditory feedback (left panel) and a speaker with hearing loss in the preimplant condition (right panel).

Image of FIG. 7.
FIG. 7.

Extent of /r/ contrast measured as the difference in the F3 transition for singleton stop vs productions with the indicated stops. Results are shown for implant users in the one-year session (filled circles) and for normal-hearing speakers with their hearing masked (clear triangles) or not masked (filled triangles).

Tables

Generic image for table
TABLE I.

Participant demographic information, vowel and consonant percent correct identification for implant users, and normal-hearing controls. (Asterisks denote missing data.)

Generic image for table
TABLE II.

Effect sizes from the three ANOVAs.

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/content/asa/journal/jasa/124/5/10.1121/1.2987427
2008-11-01
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Perception and production of /r/ allophones improve with hearing from a cochlear implanta)
http://aip.metastore.ingenta.com/content/asa/journal/jasa/124/5/10.1121/1.2987427
10.1121/1.2987427
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