• Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

You are not logged in You are logged out of this journal. Log In

Journal of the Acoustical Society of America / Volume 132 / Issue 2 / SPEECH PERCEPTION [71]

The ability of cochlear implant users to use temporal envelope cues recovered from speech frequency modulation a

a Portions of this work were presented at the Conference on Implantable Auditory Prostheses, Pacific Grove, CA, July 24–29, 2011.

J. Acoust. Soc. Am. Volume 132, Issue 2, pp. 1113-1119 (2012); (7 pages)

Jong Ho Won1, Christian Lorenzi2, Kaibao Nie3, Xing Li4, Elyse M. Jameyson3, Ward R. Drennan3, and Jay T. Rubinstein3

1Department of Audiology and Speech Pathology, University of Tennessee Health Science Center, Knoxville, Tennessee 37996
2Equipe Audition, CNRS, Universite Paris Descartes, Ecole normale superieure, Paris, 75005, France
3Virginia Merrill Bloedel Hearing Research Center, Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle, Washington 98195
4Department of Electrical Engineering, University of Washington, Seattle, Washington 98195

Full Text: Read Online (HTML) | Download PDF | Buy PDF (US$30) | View Cart
Previous studies have demonstrated that normal-hearing listeners can understand speech using the recovered “temporal envelopes,” i.e., amplitude modulation (AM) cues from frequency modulation (FM). This study evaluated this mechanism in cochlear implant (CI) users for consonant identification. Stimuli containing only FM cues were created using 1, 2, 4, and 8-band FM-vocoders to determine if consonant identification performance would improve as the recovered AM cues become more available. A consistent improvement was observed as the band number decreased from 8 to 1, supporting the hypothesis that (1) the CI sound processor generates recovered AM cues from broadband FM, and (2) CI users can use the recovered AM cues to recognize speech. The correlation between the intact and the recovered AM components at the output of the sound processor was also generally higher when the band number was low, supporting the consonant identification results. Moreover, CI subjects who were better at using recovered AM cues from broadband FM cues showed better identification performance with intact (unprocessed) speech stimuli. This suggests that speech perception performance variability in CI users may be partly caused by differences in their ability to use AM cues recovered from FM speech cues.

© 2012 Acoustical Society of America

ACKNOWLEDGMENTS

We appreciate the dedicated efforts of our CI subjects. This study was supported by NIH Grant Nos. R01-DC007525 , R01-DC010148 , P30-DC04661 , and T32-DC000033 and a fellowship from Advanced Bionics Corp. C.L. was supported by the Virginia Merrill Bloedel Traveling Scholar’s Fund. We thank Leo Litvak of Advanced Bionics for providing the MATLAB code for the speech processing electrodogram simulation.

Article Outline

  1. INTRODUCTION
  2. METHOD
    1. Subjects
    2. Vocoder processing
      1. Intact condition
      2. AM condition
      3. FM condition
    3. Acoustic simulation of an 8-channel CIS strategy for NH subjects
    4. Pulse-train output analysis
    5. Speech material and testing procedure
  3. RESULTS
  4. DISCUSSION
  5. CONCLUSIONS

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS, PACS, and IPC

Keywords

cochlear implants, frequency modulation, hearing, speech recognition, vocoders

PACS

  • 43.71.Gv

    Measures of speech perception (intelligibility and quality)

  • 43.71.Es

    Vowel and consonant perception; perception of words, sentences, and fluent speech

  • 43.71.Ky

    Speech perception by the hearing impaired

International Patent Classification (IPC)

  • A61F2/18

    Internal ear or nose parts, e.g. ear-drums

  • G10L

    Speech analysis or synthesis; Speech recognition

  • G10L15/00

    Speech recognition

  • G10L19/00

    Speech analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech

ARTICLE DATA

History
Received 30 Jul 2011
Accepted 06 May 2012
Revised 30 Apr 2012
Digital Object Identifier
http://dx.doi.org/10.1121/1.4726013

PUBLICATION DATA

ISSN

0001-4966 (print)  

Publisher

$abstract.society.value is a Member of CrossRef Acoustical Society of America

For access to fully linked references, you need to log in.

Figures (4) Tables (2)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Your Recent History Recent History Help

Recently Viewed

  1. The ability of cochlear implant users to use temporal envelope cues recovered from speech frequency modulation

Home Publications Meetings Contact ASA Site Map Back to Top

Copyright © Acoustical Society of America

close