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Multifrequency tympanometry in normal adults

R H Margolis1, H G Goycoolea

  • 1Department of Otolaryngology, University of Minnesota.

Ear and Hearing
|December 1, 1993
PubMed
Summary
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This study establishes normative data for multifrequency tympanometry in adults. It identifies preferred methods for estimating middle ear resonant frequency, crucial for accurate tympanometric measures.

Area of Science:

  • Audiology
  • Otoacoustic Emissions
  • Middle Ear Physiology

Background:

  • Tympanometry is a standard audiological test.
  • Accurate normative data and criteria for abnormal tympanometric measures are essential for clinical diagnosis.
  • Estimating the resonant frequency of the middle ear is important for comprehensive analysis.

Purpose of the Study:

  • To obtain normative data for multifrequency tympanometry in normal-hearing adults.
  • To determine abnormal criteria for tympanometric measures.
  • To identify preferred methods for clinical estimation of middle ear resonant frequency.

Main Methods:

  • Multifrequency tympanograms were recorded from 56 ears of 28 normal-hearing adults.
  • Static admittance, tympanometric width, and tympanometric peak pressure at 226 Hz were analyzed.

Related Experiment Videos

  • Eight different methods for estimating middle ear resonant frequency were evaluated.

    • Main Results:

    • The sweep pressure mode is preferred for detecting abnormally high resonant frequencies.
    • The sweep frequency mode is preferred for identifying abnormally low resonant frequencies.
    • Compensation for ear canal volume at +200 daPa was the preferred method for estimating middle ear resonant frequency.

    Conclusions:

    • Established normative data and abnormal criteria for multifrequency tympanometry.
    • Recommended preferred methods for clinical estimation of middle ear resonant frequency based on reliability and distribution characteristics.
    • Highlighted the utility of sweep pressure and sweep frequency modes for specific resonant frequency detections.