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Short-term variability of pure-tone thresholds obtained with TDH-39P earphones.

Authors
Flamme-GA; Stephenson-MR; Deiters-KK; Hessenauer-A; VanGessel-DK; Geda-K; Wyllys-K; McGregor-KD
Source
Int J Audiol 2014 Mar; 53(S2):S5-S15
NIOSHTIC No.
20043873
Abstract
Objective: To estimate the short-term variability and correlates of variability in pure-tone thresholds obtained using audiometric equipment designed for occupational use, and to examine the justification for excluding 8 kHz as a mandatory threshold in occupational hearing conservation programs. Method: Pure-tone thresholds and other hearing-related tests (e.g. noise dosimetry, otoscopy, middle-ear assessment) were conducted with a group of 527 adults between 20 and 69 years of age. Five measurement visits were completed by participants within 14 days. Results: The 50% critical difference boundaries were -5 and 0 dB at 4 kHz and below and -5 and 5 dB at 6 and 8 kHz. The likelihood of spurious notches due to test-retest variability was substantially lower than the likelihood of failing to detect a notched configuration when present. Correlates of variability included stimulus frequency, baseline threshold, acoustic reflectance of the ear, average noise exposure during the previous eight hours, age, and the tester's level of education in audiology. Conclusion: The short-term variability in 8-kHz pure-tone thresholds obtained with the TDH-39P earphone was slightly greater than at other frequencies, but this difference was not large enough to justify the disadvantages stemming from the inability to detect a 6-kHz notch.
Keywords
Auditory-system; Audiometry; Audiometers; Ears; Hearing-threshold; Hearing-conservation; Audiological-testing; Hearing-tests; Noise-exposure; Noise-frequencies; Noise-measurement; Dosimetry; Equipment-reliability; Humans; Age-factors; Hearing-acuity; Author Keywords: Audiometry; noise-induced hearing loss; reliability; occupational health
Contact
Gregory A. Flamme, Department of Speech Pathology and Audiology, Western Michigan University, 1903 W. Michigan Ave., Kalamazoo, MI 49008, USA
CODEN
IJANGS
Publication Date
20140301
Document Type
Journal Article
Email Address
greg.flamme@wmich.edu
Funding Type
Contract
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
Contract-211-2009-31218; M032014
ISSN
1499-2027
NIOSH Division
DART
Source Name
International Journal of Audiology
State
MI; OH
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