Risk Factors for Distortion Product Otoacoustic Emissions in Young Men with Normal Hearing

Author: Torre Peter   Dreisbach Laura E.   Kopke Richard   Jackson Ron   Balough Ben  

Publisher: American Academy of Audiology

ISSN: 1050-0545

Source: Journal of the American Academy of Audiology, Vol.18, Iss.9, 2007-10, pp. : 749-759

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

The purpose of this study was to evaluate the possible effects of risk factors on distortion product otoacoustic emissions (DPOAEs) in young adult men with normal hearing. Four hundred thirty-six United States Marine recruit men (mean age = 19.2 years ± 1.8 years; age range = 17 - 29 years) participated in this study. Questionnaires were given to each recruit to obtain demographic data and history of noise exposure, solvent exposure, smoking history, and hearing-related histories. Otoscopy, tympanometry, pure-tone air-conduction audiometry (2.0 – 8.0 kHz) and DPOAEs (2.3 - 8.0 kHz) were measured. DPOAE levels were lower in Not Hispanic or Latino recruits, in heavy smokers, in recruits who reported loud live music exposure and ringing in their ears after noise exposure. These differences were not statistically significant at all frequencies. Recruits with multiple risk factors had the lowest DPOAEs as compared to recruits with fewer, or no, risk factors; these differences were not statistically significant. Obtaining risk factor data as part of an audiometric evaluation is important even though the individual may have normal hearing.