Bilateral cochlear implant patients are unable to localize as well as normal hearing listeners. Although poor sensitivity to interaural time differences clearly contributes to this deficit, it is unclear whether deficits in terms of interaural level differences are also a contributing factor. In this study, localization was tested while manipulating interaural time and level cues using head-related transfer functions. The results indicate that bilateral cochlear implant users' ability to localize based on interaural level differences is actually greater than that of untrained normal hearing listeners.
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http://dx.doi.org/10.1121/1.3699017 | DOI Listing |
Q J Exp Psychol (Hove)
January 2025
Hearing Aid Laboratory, Northwestern University, Department of Communication Sciences and Disorders Evanston, IL, USA.
Listeners often find themselves in scenarios where speech is disrupted, misperceived, or otherwise difficult to recognize. In these situations, many individuals report exerting additional effort to understand speech, even when repairing speech may be difficult or impossible. This investigation aimed to characterize cognitive effort across time during both sentence listening and a post-sentence retention interval by observing the pupillary response of participants with normal to borderline normal hearing in response to two interrupted speech conditions: sentences interrupted by gaps of silence or bursts of noise.
View Article and Find Full Text PDFFront Neurosci
January 2025
The First Affiliated Hospital of Soochow University, Suzhou, China.
Background: Electrically evoked compound action potential (ECAP) can be used to measure the auditory nerve's response to electrical stimulation in cochlear implant (CI) users. In the Nurotron CI system, extracting the ECAP waveform from the stimulus artifact is time-consuming.
Method: We developed a new paradigm ("FastCAP") for use with Nurotron CI devices.
Int J Numer Method Biomed Eng
January 2025
Bioengineering, Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Gauteng, South Africa.
The imaging of the live cochlea is a challenging task. Regardless of the quality of images obtained from modern clinical imaging techniques, the internal structures of the cochlea mainly remain obscured. Electrical impedance tomography (EIT) is a safe, low-cost alternative medical imaging technique with applications in various clinical scenarios.
View Article and Find Full Text PDFLaryngoscope
January 2025
Department of Otolaryngology - Head and Neck Surgery, University of Washington, Seattle, Washington, USA.
Objective: To provide evidence to use an extended frequency pure tone average to screen for cochlear implant evaluation candidates as recommended by the American Cochlear Implant Alliance. Additionally, to determine whether traditional low frequency, high or low frequency, high frequency, or extended frequency pure tone average most accurately predicts cochlear implant candidates based on speech perception scores from aided AzBio sentence testing or aided consonant-nucleus-consonant (CNC) testing.
Method: Adults from a tertiary care center who completed aided sentence testing during cochlear implant evaluation between 2014 and 2024 were assessed.
Acta Otolaryngol
January 2025
Department of Audiology, Hacettepe University, Ankara, Turkey.
Background: The intraoperative measurements are essential steps in cochlear implant (CI) surgery for confirming correct electrode placement.
Objectives: To examine the intraoperative impedance and electrically evoked action potential (ECAP) measurement results of cochlear implant (CI) users with normal cochlear anatomy (NCA) and to compare them with CI users with inner ear malformations (IEM).
Material And Methods: This retrospective study included intraoperative data of 300 ears from 258 individuals using Medel and Cochlear (Nucleus) CI devices.
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