View in EDS

Influence of a shift in frequency distribution and analysis rate on phoneme intelligibility in noisy environments for simulated bilateral cochlear implants

Saved in:
Bibliographic Details
Title: Influence of a shift in frequency distribution and analysis rate on phoneme intelligibility in noisy environments for simulated bilateral cochlear implants
Authors: Kallel, Fathi1,2 fathikallel@yahoo.fr, Laboissiere, Rafael2, Ben Hamida, Ahmed1, Berger-Vachon, Christian2
Source: Applied Acoustics. Jan2013, Vol. 74 Issue 1, p10-17. 8p.
Subjects: Distribution (Probability theory), Phonemics, Simulation methods & models, Cochlear implants, Auditory perception, Signal-to-noise ratio, Manufacturing processes
Abstract: Abstract: A model was developed to simulate acoustically sound perception through a cochlear implant (CI), in order to evaluate the effects of a spectral shift and analysis rate on speech recognition in quiet and noise. In the current study, we considered two analysis rates, 250Hz and 500Hz, and two CI modes: Symmetric Bilateral Cochlear Implant (SBCI) and Shifted Bilateral Cochlear Implant (ShBCI). Processing and coding strategies used in this model were adapted from the Digisonic SP CI, manufactured by Neurelec. Intelligibility of speech signals processed to simulate different analysis rates and CI modes were assessed by a group of fifty normal-hearing subjects. The analysis rate was simulated by varying the overlap between successive analysis frames using a narrow band vocoder. With the SBCI mode, both ears were stimulated with the same signal (the same frequency filters were used). With the ShBCI mode, the filters were shifted in frequency (between the two ears). All the conditions were tested in quiet and in noisy environment with three different Signals to Noise Ratios (SNR). The database testing procedure used in this experimentation involved 3-phoneme words selected from the French Lafon’s lists. Speech signals were corrupted by addition of speech multi-talker babble noise. Results showed a significant effect of CI mode, of analysis rate and of SNR. The analysis rate effect was small in quiet and significant in noisy environments. The 500Hz analysis rate led to better performances than the 250Hz. Higher performances were also observed with the ShBCI mode in noisy environments. Results were mainly consistent with findings obtained from previous cochlear implant studies which suggest that CI users may perform better with a shifted bilateral stimulation in noisy environments, and with a higher analysis rate. [Copyright &y& Elsevier]
Copyright of Applied Acoustics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 79806590
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Influence of a shift in frequency distribution and analysis rate on phoneme intelligibility in noisy environments for simulated bilateral cochlear implants
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Kallel%2C+Fathi%22">Kallel, Fathi</searchLink><relatesTo>1,2</relatesTo><i> fathikallel@yahoo.fr</i><br /><searchLink fieldCode="AR" term="%22Laboissiere%2C+Rafael%22">Laboissiere, Rafael</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Ben+Hamida%2C+Ahmed%22">Ben Hamida, Ahmed</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Berger-Vachon%2C+Christian%22">Berger-Vachon, Christian</searchLink><relatesTo>2</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Applied+Acoustics%22">Applied Acoustics</searchLink>. Jan2013, Vol. 74 Issue 1, p10-17. 8p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Distribution+%28Probability+theory%29%22">Distribution (Probability theory)</searchLink><br /><searchLink fieldCode="DE" term="%22Phonemics%22">Phonemics</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+methods+%26+models%22">Simulation methods & models</searchLink><br /><searchLink fieldCode="DE" term="%22Cochlear+implants%22">Cochlear implants</searchLink><br /><searchLink fieldCode="DE" term="%22Auditory+perception%22">Auditory perception</searchLink><br /><searchLink fieldCode="DE" term="%22Signal-to-noise+ratio%22">Signal-to-noise ratio</searchLink><br /><searchLink fieldCode="DE" term="%22Manufacturing+processes%22">Manufacturing processes</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: A model was developed to simulate acoustically sound perception through a cochlear implant (CI), in order to evaluate the effects of a spectral shift and analysis rate on speech recognition in quiet and noise. In the current study, we considered two analysis rates, 250Hz and 500Hz, and two CI modes: Symmetric Bilateral Cochlear Implant (SBCI) and Shifted Bilateral Cochlear Implant (ShBCI). Processing and coding strategies used in this model were adapted from the Digisonic SP CI, manufactured by Neurelec. Intelligibility of speech signals processed to simulate different analysis rates and CI modes were assessed by a group of fifty normal-hearing subjects. The analysis rate was simulated by varying the overlap between successive analysis frames using a narrow band vocoder. With the SBCI mode, both ears were stimulated with the same signal (the same frequency filters were used). With the ShBCI mode, the filters were shifted in frequency (between the two ears). All the conditions were tested in quiet and in noisy environment with three different Signals to Noise Ratios (SNR). The database testing procedure used in this experimentation involved 3-phoneme words selected from the French Lafon’s lists. Speech signals were corrupted by addition of speech multi-talker babble noise. Results showed a significant effect of CI mode, of analysis rate and of SNR. The analysis rate effect was small in quiet and significant in noisy environments. The 500Hz analysis rate led to better performances than the 250Hz. Higher performances were also observed with the ShBCI mode in noisy environments. Results were mainly consistent with findings obtained from previous cochlear implant studies which suggest that CI users may perform better with a shifted bilateral stimulation in noisy environments, and with a higher analysis rate. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Applied Acoustics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=79806590
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.apacoust.2012.05.014
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 10
    Subjects:
      – SubjectFull: Distribution (Probability theory)
        Type: general
      – SubjectFull: Phonemics
        Type: general
      – SubjectFull: Simulation methods & models
        Type: general
      – SubjectFull: Cochlear implants
        Type: general
      – SubjectFull: Auditory perception
        Type: general
      – SubjectFull: Signal-to-noise ratio
        Type: general
      – SubjectFull: Manufacturing processes
        Type: general
    Titles:
      – TitleFull: Influence of a shift in frequency distribution and analysis rate on phoneme intelligibility in noisy environments for simulated bilateral cochlear implants
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Kallel, Fathi
      – PersonEntity:
          Name:
            NameFull: Laboissiere, Rafael
      – PersonEntity:
          Name:
            NameFull: Ben Hamida, Ahmed
      – PersonEntity:
          Name:
            NameFull: Berger-Vachon, Christian
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 01
              Text: Jan2013
              Type: published
              Y: 2013
          Identifiers:
            – Type: issn-print
              Value: 0003682X
          Numbering:
            – Type: volume
              Value: 74
            – Type: issue
              Value: 1
          Titles:
            – TitleFull: Applied Acoustics
              Type: main
ResultId 1