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Stimulus and transducer effects on threshold.

Authors
Flamme-GA; Geda-K; McGregor-KD; Wyllys-K; Deiters-KK; Murphy-WJ; Stephenson-MR
Source
Int J Audiol 2015 Feb; 54(S1):S19-S29
NIOSHTIC No.
20045514
Abstract
Objective: This study examined differences in thresholds obtained under Sennheiser HDA200 circumaural earphones using pure tone, equivalent rectangular noise bands, and 1/3 octave noise bands relative to thresholds obtained using Telephonics TDH-39P supra-aural earphones. Design: Thresholds were obtained via each transducer and stimulus condition six times within a 10-day period. Study sample: Forty-nine adults were selected from a prior study to represent low, moderate, and high threshold reliability. Results: The results suggested that (1) only small adjustments were needed to reach equivalent TDH-39P thresholds, (2) pure-tone thresholds obtained with HDA200 circumaural earphones had reliability equal to or better than those obtained using TDH-39P earphones, (3) the reliability of noise-band thresholds improved with broader stimulus bandwidth and was either equal to or better than pure-tone thresholds, and (4) frequency-specificity declined with stimulus bandwidths greater than one equivalent rectangular band, which could complicate early detection of hearing changes that occur within a narrow frequency range. Conclusions: These data suggest that circumaural earphones such as the HDA200 headphones provide better reliability for audiometric testing as compared to the TDH-39P earphones. These data support the use of noise bands, preferably ERB noises, as stimuli for audiometric monitoring.
Keywords
Hearing-acuity; Hearing-impairment; Hearing-loss; Hearing-tests; Audiometers; Audiological-testing; Noise-induced-hearing-loss; Humans; Equipment-reliability; 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
CODEN
IJANGS
Publication Date
20150201
Document Type
Journal Article
Email Address
greg.flamme@wmich.edu
Funding Type
Contract
Fiscal Year
2015
NTIS Accession No.
NTIS Price
Identifying No.
Contract-254-2011-M-40487
ISSN
1499-2027
NIOSH Division
DART
Priority Area
Manufacturing
Source Name
International Journal of Audiology
State
MI; OH
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