Inactive L-threonine 3-dehydrogenase, mitochondrial precursor (Short chain dehydrogenase/reductase family 14E member 1 pseudogene) [SDR14E1P]

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Reference hearing threshold levels for short duration signals.

Hearing thresholds for clicks and tonebursts were measured on 26 otologically normal persons (age 18-25 years) using the earphones Sennheiser HDA 200 and Telephonics TDH 39. The test signals are specified in IEC 60645-3 and in ISO 389-9. The acoustic test signals were presented both as a single stimulus and as repeated stimuli with the repetition rate of 20 Hz. The frequencies used for the toneburst were: 250, 500, 1000, 2000, 3000, 4000, 6000, and 8000 Hz. Test signals and measurement methods were all in accordance with the recommendations given in ISO 389-9: Preferred test conditions for the determination of reference hearing threshold levels. The results are given as peak-to-peak equivalent threshold sound pressure levels (peETSPL). The results are in good agreement with other sparse results from literature and are part of the basis for the ISO 389-6 standard from 2007.

MeSH Terms

  • Acoustic Stimulation
  • Adult
  • Aging
  • Audiometry
  • Audiometry, Pure-Tone
  • Auditory Threshold
  • Calibration
  • Equipment Design
  • Female
  • Humans
  • Male
  • Reference Values
  • Young Adult