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Related Experiment Video

Updated: Mar 28, 2026

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
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Precedence based speech segregation in bilateral cochlear implant users.

Shaikat Hossain1, Vahid Montazeri1, Peter F Assmann1

  • 1School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson Texas 75083-0688, USA.

The Journal of the Acoustical Society of America
|January 3, 2016
PubMed
Summary
This summary is machine-generated.

The precedence effect (PE) helps us focus on the main sound source in echoey environments. Bilateral cochlear implant users did not show these PE benefits, suggesting other factors are involved.

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Area of Science:

  • Auditory perception
  • Acoustics
  • Speech processing

Background:

  • The precedence effect (PE) is crucial for perceptual dominance of a leading sound source over echoes in reverberant spaces.
  • PE aids sound localization and spatial unmasking of speech, improving speech intelligibility in complex auditory scenes.

Purpose of the Study:

  • To investigate the role of the precedence effect (PE) in speech segregation.
  • To determine if bilateral cochlear implant users exhibit PE-based benefits in speech segregation tasks.

Main Methods:

  • Utilized binaural vocoder simulations with identical channel center frequencies and phase.
  • Assessed PE-based benefits in a closed-set speech segregation task with normal-hearing listeners and bilateral cochlear implant users.

Main Results:

  • Normal-hearing listeners demonstrated PE-based benefits in the speech segregation task.
  • Bilateral cochlear implant users did not derive similar PE-based benefits from the same stimuli.

Conclusions:

  • Envelope extraction alone may not fully explain the breakdown of PE benefits in cochlear implant users.
  • Additional factors beyond envelope processing likely influence the precedence effect in individuals with bilateral cochlear implants.