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Related Experiment Video

Updated: Jul 15, 2026

Enhanced Cochlear Coverage and Hearing Preservation in High-Frequency Hearing Loss via Electric Acoustic Stimulation with Longer Electrode
03:49

Enhanced Cochlear Coverage and Hearing Preservation in High-Frequency Hearing Loss via Electric Acoustic Stimulation with Longer Electrode

Published on: October 11, 2024

Auditory function and speech understanding in listeners who qualify for EAS surgery.

René H Gifford1, Michael F Dorman, Anthony J Spahr

  • 1Cochlear Implant Laboratory, Department of Speech and Hearing Science, Arizona State University, Tempe, Arizona, USA. gifford.rene@mayo.edu

Ear and Hearing
|May 15, 2007
PubMed
Summary

Patients undergoing combined electric and acoustic stimulation (EAS) surgery show varied auditory abilities. Frequency selectivity, not speech recognition, correlated with melody recognition, suggesting its importance for EAS outcomes.

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Area of Science:

  • Auditory Neuroscience
  • Speech Processing
  • Medical Device Technology

Background:

  • Patients with combined electric and acoustic stimulation (EAS) criteria have poor high-frequency hearing.
  • Assessing auditory function and speech recognition is crucial for EAS candidates.

Purpose of the Study:

  • Evaluate low-frequency auditory function deficits in EAS candidates.
  • Identify sensitive measures for electrode array insertion effects.
  • Correlate auditory function with speech and melody recognition.

Main Methods:

  • Measured frequency selectivity, temporal resolution, and nonlinear cochlear function.
  • Assessed speech (word, sentence, consonant, vowel) and melody recognition.
  • Included 5 normal-hearing and 17 hearing-impaired listeners meeting EAS criteria.

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Last Updated: Jul 15, 2026

Enhanced Cochlear Coverage and Hearing Preservation in High-Frequency Hearing Loss via Electric Acoustic Stimulation with Longer Electrode
03:49

Enhanced Cochlear Coverage and Hearing Preservation in High-Frequency Hearing Loss via Electric Acoustic Stimulation with Longer Electrode

Published on: October 11, 2024

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

Published on: June 21, 2024

Main Results:

  • Nonlinear cochlear function was reduced or absent; low-frequency (500 Hz) selectivity was reduced but present.
  • Temporal resolution was normal at low modulation frequencies; speech recognition in noise was poorer than normal.
  • Speech and melody recognition varied widely; no auditory measure correlated with speech recognition, but frequency selectivity correlated with melody recognition.

Conclusions:

  • EAS candidates exhibit diverse speech and melody recognition skills.
  • Psychophysical measures may better detect electrode array impact than audiograms.
  • Speech recognition did not correlate with tested auditory function measures.