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Volume 42 Number 3, May/June 2005
Pages 353 — 362

Abstract - Evaluation of insert earphones for high-frequency bedside ototoxicity monitoring

Jane S. Gordon, MS;1* David S. Phillips, PhD;1 Wendy J. Helt, MA;1 Dawn Konrad-Martin, PhD;1-2
Stephen A. Fausti, PhD1-2

1Department of Veterans Affairs (VA) Rehabilitation Research and Development National Center for Rehabilitative Auditory Research, Portland VA Medical Center, Portland, OR; 2Department of Otolaryngology, Oregon Health and Science University, Portland, OR
Abstract — Ototoxic hearing loss is usually detected earliest through monitoring of the highest audible frequencies in individuals administered ototoxic medications. Conducting ototoxicity monitoring may require testing patients in the hospital room. This study evaluated the use of insert earphones for obtaining reliable threshold responses at bedside. Twenty adult subjects were tested during two different sessions in the sound booth and on the ward. Thresholds were obtained for frequencies from 5 to 16 kHz and at 2 kHz with the use of the KOSS Pro/4X Plus earphones and Etymotic ER-4B MicroPro insert earphones. Results indicate that ER-4B insert earphones are as reliable as KOSS earphones for testing on the ward for high-frequency ototoxicity monitoring.
Key words: circumaural earphones, early detection, hearing thresholds, high-frequency testing, insert earphones, instrumentation, intrasubject reliability, ototoxicity monitoring, test-retest reliability, threshold reliability.

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