4.0 Article

Dead regions in the cochlea at 4 kHz in elderly adults: Relation to absolute threshold, steepness of audiogram, and pure-tone average

Journal

JOURNAL OF THE AMERICAN ACADEMY OF AUDIOLOGY
Volume 18, Issue 2, Pages 97-106

Publisher

AMER ACADEMY OF AUDIOLOGY
DOI: 10.3766/jaaa.18.2.2

Keywords

absolute threshold; audiogram; dead regions; elderly adults; TEN test

Funding

  1. MRC [G8717539] Funding Source: UKRI
  2. Medical Research Council [G8717539] Funding Source: Medline
  3. Medical Research Council [G8717539] Funding Source: researchfish

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The aims of this study were (1) to investigate the prevalence of dead regions (DRs) at 4 kHz in elderly people with hearing loss and (2) to determine the extent to which the presence/absence of a DR can be predicted from the absolute threshold, the slope of the audiogram, or the pure-tone average (PTA) hearing loss at 0.5, 1, and 2 kHz. DRs were assessed for 98 ears with absolute thresholds between 60 and 85 dB HL at 4 kHz using the threshold equalizing noise test. Thirty-six ears had a DR at 4 kHz. There was no statistically significant difference in the slope of the audiogram or PTA between ears with and without DRs. However, the mean absolute threshold at 4 kHz was significantly higher for the group with DRs than for the group without DRs. The prevalence of DRs exceeded 50% for hearing losses greater than 70 dB.

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