Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience.

Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience. Abstract Text:

Nathaniel A Whitmal,Sarah F Poissant,Richard L Freyman,Karen S Helfer,

Channel vocoders using either tone or band-limited noise carriers have been used in experiments to simulate cochlear implant processing in normal-hearing listeners. Previous results from these experiments have suggested that the two vocoder types produce speech of nearly equal intelligibility in quiet conditions. The purpose of this study was to further compare the performance of tone and noise-band vocoders in both quiet and noisy listening conditions. In each of four experiments, normal-hearing subjects were better able to identify tone-vocoded sentences and vowel-consonant-vowel syllables than noise-vocoded sentences and syllables, both in quiet and in the presence of either speech-spectrum noise or two-talker babble. An analysis of consonant confusions for listening in both quiet and speech-spectrum noise revealed significantly different error patterns that were related to each vocoder's ability to produce tone or noise output that accurately reflected the consonant's manner of articulation. Subject experience was also shown to influence intelligibility. Simulations using a computational model of modulation detection suggest that the noise vocoder's disadvantage is in part due to the intrinsic temporal fluctuations of its carriers, which can interfere with temporal fluctuations that convey speech recognition cues.

Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience. Publishing Authors By Initials

NA Whitmal,SF Poissant,RL Freyman,KS Helfer,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: The Journal of the Acoustical Society of America

VOLUME: 122

Page Numbers: 2376-88

Journal Abbreviation: J. Acoust. Soc. Am.

ISSN: 1520-8524

DAY: 28

MONTH: Oct

YEAR: 2007

Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 7503051

Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience.

AFFILIATION: Department of Communication Disorders, University of Massachusetts, Amherst, Massachusetts 01003, USA. nwhitmal@comdis.umass.edu

Country: United States

AGENCY: United States NIDCD

GRANT: R03 DC7969-01

ACRONYM: DC

MEDLINETA: J Acoust Soc Am

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience Related Publications

• Cross-sectional study of differences in speech understanding between users and nonusers of estrogen replacement therapy.
• Cryptococcus neoformans meningo-encephalitis; report of case treated with actidione and forced drainage.
• Speech intelligibility in cochlear implant simulations: Effects of carrier type, interfering noise, and subject experience.
• [Case of lipomatosis of the tongue.]
• [Clinical aspect of pneumonia.]
• [Holistic nursing. Breathing--expression of our soul. From breath to breath]