Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: May 26, 2026

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation
06:54

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation

Published on: August 4, 2023

Reducing current spread using current focusing in cochlear implant users.

David M Landsberger1, Monica Padilla, Arthi G Srinivasan

  • 1Department of Communication and Auditory Neuroscience, House Research Institute, 2100 West 3rd Street, Los Angeles, CA 90057, USA. dlandsberger@hei.org

Hearing Research
|January 11, 2012
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Apical Electrode Placement to Augment Intracochlear Current in Patients With an Ossified Cochlea and Incomplete Electrode Array Insertion.

Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·2026
Same author

Remote Monitoring of Bioelectrical Impedance in Patients With Breast Cancer-Related Lymphedema: 1-Year Pilot Longitudinal Study.

JMIR biomedical engineering·2026
Same author

Validation of CURB-65, CRB-65, NEWS2, qSOFA, and 4C scores for predicting mortality in COVID-19 patients across seven emergency Departments in Colombia.

Frontiers in medicine·2026
Same author

Using vocoders to the implanted ear to investigate the binaural benefit for music sound quality in single-sided deaf cochlear implant users.

Hearing research·2026
Same author

Comparison of Mineral Levels in Blood and Hair Samples of Healthy Adults: Evaluating the Clinical Utility of Hair Mineral Analysis.

Biological trace element research·2025
Same author

At-Home Bioelectrical Impedance Analysis (BIA) Monitoring of Adult Females at Risk of Breast Cancer-Related Lymphedema: Nonrandomized One-Year Longitudinal Feasibility Study.

JMIR formative research·2025

Partial tripolar (PTP) stimulation may improve cochlear implant hearing in challenging environments. Not all patients benefit from reduced spread of excitation (SOE) with PTP, but discrimination tests can predict success.

Area of Science:

  • Audiology and Hearing Science
  • Biomedical Engineering
  • Neuroscience

Background:

  • Cochlear implant (CI) performance in noisy environments is often limited by channel interactions, specifically the spread of excitation (SOE).
  • Partial tripolar (PTP) stimulation is a technique designed to reduce SOE by focusing the electrical field.
  • Increased current focusing, while reducing SOE, may paradoxically increase SOE at higher absolute current levels needed for consistent loudness perception.

Purpose of the Study:

  • To investigate the relationship between the degree of current focusing and the spread of excitation (SOE) at equivalent loudness levels in cochlear implant users.
  • To evaluate the effectiveness of PTP stimulation in reducing SOE across different patients.
  • To determine if objective (discrimination) and subjective (scaling) measures can predict which patients might benefit from PTP stimulation strategies.

More Related Videos

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
07:00

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

Related Experiment Videos

Last Updated: May 26, 2026

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation
06:54

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation

Published on: August 4, 2023

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
07:00

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

Main Methods:

  • Experiment 1: Measured SOE using a forward-masking procedure for equally loud stimuli with varying degrees of current focusing (PTP stimulation).
  • Experiment 2: Assessed patients' ability to discriminate between different levels of current focusing.
  • Experiment 3: Utilized subjective scaling of verbal descriptors for stimuli presented with various current focusing levels.

Main Results:

  • Results indicated that PTP stimulation reduced SOE at fixed loudness for some, but not all, patients.
  • Both the ability to discriminate current focusing levels and subjective scaling of stimuli correlated well with SOE reduction.
  • These findings suggest that PTP speech processing may enhance spectral resolution only in specific patient subgroups.

Conclusions:

  • Partial tripolar stimulation shows potential for improving spectral resolution in cochlear implant users by reducing SOE, but its efficacy varies among individuals.
  • Objective and subjective measures of current focusing discrimination and perception are promising clinical tools for identifying patients likely to benefit from PTP strategies.
  • Further research into personalized PTP strategies could optimize hearing performance in challenging listening conditions for a broader range of cochlear implant recipients.