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Related Experiment Videos

Input-voltage method of bone-conduction calibration

W A Meissner1, J E Lankford

  • 1George A. Zeller Mental Health Center, Peoria, Ill. 61614.

Archives of Otolaryngology (Chicago, Ill. : 1960)
|December 1, 1976
PubMed
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The input-voltage method offers a cost-effective way to calibrate bone-conduction audiometers. This study found it provides accurate results comparable to the artificial-mastoid system for hearing assessments.

Area of Science:

  • Audiology
  • Biomedical Engineering
  • Medical Instrumentation

Background:

  • Calibration of bone-conduction audiometers is crucial for accurate hearing assessments.
  • The input-voltage method is a low-cost and easily implemented calibration technique.
  • Previous assessments suggested limitations of the input-voltage method, warranting re-evaluation with updated standards.

Purpose of the Study:

  • To re-examine the accuracy of the input-voltage method for calibrating bone-conduction audiometers.
  • To compare calibration corrections derived from the input-voltage method against those from an artificial-mastoid system.
  • To determine the clinical applicability of the input-voltage method.

Main Methods:

  • Audiometric corrections were determined for 21 audiometer and bone vibrator combinations across five test frequencies using an artificial-mastoid system.

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  • Corrections obtained via the input-voltage method were compared to those derived from the artificial-mastoid system.
  • The deviation between the two calibration methods was statistically analyzed.

    • Main Results:

    • The input-voltage method yielded corrections that agreed directly with or deviated no more than 5 dB from artificial-mastoid corrections in 93.4% of cases.
    • Deviations of 10 dB were observed in only 6.6% of the tested combinations.
    • High agreement was found between the input-voltage method and the artificial-mastoid system.

    Conclusions:

    • The input-voltage method demonstrates high accuracy and reliability for calibrating bone-conduction audiometers.
    • This method is a viable and recommended alternative to the artificial-mastoid system when the latter is unavailable.
    • The findings support the clinical use of the input-voltage method for ensuring accurate audiometric evaluations.