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Related Concept Videos

The Cochlea01:13

The Cochlea

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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Influence of bilateral cochlear implants on vocal control.

Abbigail Kirchner1, Torrey M Loucks2, Elizabeth Abbs1

  • 1Department of Speech and Hearing Science, The University of Illinois at Urbana Champaign, 901 South 6th Street, Champaign, Illinois 61820, USA.

The Journal of the Acoustical Society of America
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Bilateral cochlear implants (CIs) may hinder vocal pitch control in deaf individuals. Using both CIs resulted in worse fundamental frequency (F0) control compared to using a single CI, suggesting potential detriments to vocalization.

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Area of Science:

  • Audiology
  • Speech Science
  • Neuroscience

Background:

  • Cochlear implants (CIs) can enhance speech perception and vocal pitch control in deaf individuals.
  • Bilateral CIs may introduce pitch perception mismatches, potentially impacting vocalization benefits.

Purpose of the Study:

  • To investigate the effect of bilateral cochlear implant use on fundamental frequency (F0) control during sustained vocalization.
  • To compare vocal control between single CI use, bilateral CI use, and no CI use.

Main Methods:

  • 23 bilateral CI users performed sustained vocalizations using one CI, the other CI, both CIs, or neither.
  • A control group of 8 normal-hearing participants also completed the vocalization task.

Main Results:

  • Fundamental frequency (F0) control was significantly worse when using both CIs compared to the ear with lower vocal variability.
  • A wide range of F0 variability (6-46 cents) was observed even in stable vocalization portions.

Conclusions:

  • Bilateral cochlear implant use can detrimentally affect vocal control and pitch regulation.
  • Optimizing CI use for vocalization may require considering individual pitch perception differences.