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Reference hearing threshold levels for short duration signals.

Torben Poulsen1, Søren Vase Legarth

  • 1Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark. tp@elektro.dtu.dk

International Journal of Audiology
|October 17, 2008
PubMed
Summary

This study measured hearing thresholds in young adults using specific earphones and acoustic signals. Results align with existing literature, supporting the ISO 389-6 standard for hearing measurements.

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Area of Science:

  • Audiology
  • Acoustics
  • Hearing Science

Background:

  • Accurate hearing threshold determination is crucial for audiological assessments.
  • Standardized measurement conditions are essential for reliable hearing data.
  • Previous data on reference hearing threshold levels had some limitations.

Purpose of the Study:

  • To establish reference hearing threshold levels using specific earphones and acoustic signals.
  • To validate measurement methods against international standards.
  • To provide data contributing to the ISO 389-6 standard.

Main Methods:

  • Hearing thresholds were measured in 26 otologically normal young adults (18-25 years).
  • Sennheiser HDA 200 and Telephonics TDH 39 earphones were used.
  • Clicks and tonebursts (250-8000 Hz) were presented as single and repeated stimuli (20 Hz) following ISO 389-9 guidelines.

Main Results:

  • Hearing thresholds were determined as peak-to-peak equivalent threshold sound pressure levels (peETSPL).
  • Measurements were conducted under preferred test conditions as per ISO 389-9.
  • The obtained results showed good agreement with sparse literature data.

Conclusions:

  • The study successfully established hearing thresholds under standardized conditions.
  • The findings support the development and refinement of international hearing measurement standards.
  • This research contributed foundational data for the ISO 389-6 standard.