Stimulus and transducer effects on threshold.
| Autor: | Flamme GA; Department of Speech Pathology and Audiology, Western Michigan University , Kalamazoo, Michigan , USA., Geda K, McGregor KD, Wyllys K, Deiters KK, Murphy WJ, Stephenson MR |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | International journal of audiology [Int J Audiol] 2015 Feb; Vol. 54 Suppl 1, pp. S19-29. Date of Electronic Publication: 2014 Dec 30. |
| DOI: | 10.3109/14992027.2014.979300 |
| Abstrakt: | 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. |
| Databáze: | MEDLINE |
| Externí odkaz: |
|