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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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When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
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Related Experiment Video

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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

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Cochlear implant users' spectral ripple resolution.

Eun Kyung Jeon1, Christopher W Turner2, Sue A Karsten3

  • 1Department of Communication Sciences and Disorders, University of Iowa, 227 SHC, 200 Hawkins Drive, Iowa City, Iowa 52242, USA.

The Journal of the Acoustical Society of America
|November 2, 2015
PubMed
Summary
This summary is machine-generated.

Cochlear implant (CI) users implanted recently show improved spectral ripple resolution compared to older recipients. This enhanced spectral processing in modern CI users may correlate with better pre-operative hearing abilities.

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Area of Science:

  • Audiology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Spectral ripple resolution is crucial for understanding speech in complex acoustic environments.
  • Cochlear implant (CI) technology has advanced significantly over the past two decades.
  • Previous research established baseline spectral ripple resolution abilities in CI users.

Purpose of the Study:

  • To compare spectral ripple resolution in recent CI recipients with those implanted longer ago.
  • To assess if recent CI recipients' spectral resolution matches that of hearing-impaired listeners.
  • To investigate the relationship between pre-operative speech perception and spectral ripple resolution in CI users.

Main Methods:

  • Comparing spectral ripple resolution abilities of CI recipients implanted within the last 10 years.
  • Utilizing previously published data from normal-hearing and hearing-impaired listeners for comparison.
  • Analyzing pre-operative speech perception scores of recent CI recipients.

Main Results:

  • Recently implanted CI recipients demonstrated significantly better spectral ripple resolution than those implanted 15-20 years ago.
  • No significant difference in spectral ripple resolution was found between recent CI users and hearing-impaired listeners.
  • Recent CI users exhibited superior pre-operative speech perception compared to previously reported CI users.

Conclusions:

  • Modern cochlear implant technology is associated with improved spectral ripple resolution.
  • Enhanced spectral processing in recent CI users may contribute to better pre-operative speech understanding.
  • Further research is needed to isolate the impact of device improvements versus other factors on CI user performance.