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Quantification of audiogram fine-structure as a function of hearing threshold.

J Wiebe Horst1, Hero P Wit, Frans W J Albers

  • 1Department of Otorhinolaryngology, University Hospital Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands. j.w.horst@med.rug.nl

Hearing Research
|February 14, 2003
PubMed
Summary

This study reveals that Meniere's disease patients with greater hearing loss have less audiogram fine-structure. Reduced fine-structure, indicated by fewer and lower peaks, correlates with increased hearing thresholds.

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Area of Science:

  • Audiology
  • Otolaryngology
  • Neuroscience

Background:

  • Meniere's disease is a disorder of the inner ear.
  • Audiograms assess hearing thresholds across frequencies.
  • Fine-structure in audiograms may reflect cochlear mechanics.

Purpose of the Study:

  • To quantify the fine-structure in audiograms of Meniere's disease patients.
  • To investigate the relationship between hearing loss and audiogram fine-structure.
  • To characterize fine-structure using peak number and height.

Main Methods:

  • Analysis of audiograms from 39 ears of 21 Meniere's disease patients.
  • Measurement of fine-structure parameters (N(p), S(p), H(p)) in the 500-3500 Hz range.
  • Correlation analysis between hearing thresholds and fine-structure metrics.

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Main Results:

  • A negative correlation was found between hearing loss and fine-structure strength (N(p), S(p), H(p)).
  • Higher hearing thresholds corresponded to fewer and shorter peaks in the audiogram.
  • The summated peak height (S(p)) strongly depended on the degree of hearing loss.

Conclusions:

  • Audiogram fine-structure is diminished in Meniere's disease patients with significant hearing loss.
  • The number and height of peaks in audiograms are sensitive indicators of cochlear function in Meniere's disease.
  • Fine-structure analysis offers insights into the pathophysiology of Meniere's disease.