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Related Concept Videos

Sound Intensity Level00:53

Sound Intensity Level

5.1K
Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
5.1K

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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Evaluating recommended audiometric changes to candidacy using the speech intelligibility index.

Carolina Leal1, Josephine Marriage2,3, Deborah Vickers4

  • 1a Hearing Implant Centre , St Thomas Hospital , 2nd Floor Lambeth Wing, Westminster Bridge Road, London SE1 7EH , UK.

Cochlear Implants International
|April 22, 2016
PubMed
Summary

The proposed 80 dB HL criteria for cochlear implant candidacy may offer insufficient audibility for many hearing loss profiles. The Speech Intelligibility Index (SII) score supports this, aiding decisions for potential cochlear implant (CI) recipients.

Keywords:
80 dB HL criteriaCochlear implantImplant candidacy criteriaSIISpeech intelligibility index

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Area of Science:

  • Audiology
  • Hearing Science
  • Medical Devices

Background:

  • Current UK cochlear implant (CI) candidacy guidelines by NICE use 90 dB HL thresholds.
  • Recent research suggests lowering this threshold to 80 dB HL for CI candidacy.
  • This study evaluates the audibility of hearing loss profiles under both criteria.

Purpose of the Study:

  • To analyze aided Speech Intelligibility Index (SII) scores for hearing loss profiles within existing and proposed CI candidacy criteria.
  • To determine if the proposed 80 dB HL criteria offer sufficient audibility for CI benefit.
  • To assess the utility of the SII score in CI candidacy decisions.

Main Methods:

  • Analysis of aided SII scores for various hearing loss profiles.
  • Comparison of SII scores for profiles meeting the 90 dB HL criteria versus the proposed 80 dB HL criteria.
  • Evaluation against a recommended SII cut-off of 0.65 for adequate audibility.

Main Results:

  • Most hearing loss profiles within the proposed 80 dB HL criteria showed aided SII scores below 0.65.
  • An SII score below 0.65 indicates insufficient audibility for significant hearing aid benefit.
  • This suggests potential CI candidates under the 80 dB HL criteria may not achieve adequate benefit.

Conclusions:

  • The findings support the proposed revision to the 80 dB HL criterion for cochlear implant candidacy.
  • The Speech Intelligibility Index (SII) is a valuable tool for assessing audibility and supporting CI candidacy decisions.
  • SII is particularly useful for evaluating borderline candidates under revised criteria.