Abstract
As a part of an investigation on the hearing acuity of Air Force personnel, pure-tone audiometric tests and job, noise, and medical history questionnaires were administered to 996 Bergstrom AFB flight-line personnel. For 16 Air Force Specialty groups mean hearing losses (better and worse ear) at 4000 cps ranged from 1.8 db to 20.7 db re audiometer zero. Worse-ear hearing losses at 3000 cps and at 4000 cps in nine Air Force Specialty groups (N=854) did not differ significantly from one group to another. Significant positive correlation was found when 4000-cps hearing loss was correlated with age and when 4000-cps hearing loss was correlated with length of noise exposure. However, when the positive hearing loss vs exposure correlation was adjusted for the positive relationship between age and exposure, no remaining statistically significant relationship existed between 4000-cps hearing loss and length of noise exposure. Infrequent use of ear protection is interpreted as evidence indicating a real need for effective noise and ear-protection indoctrination of personnel exposed to high-level on the job noise.
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