Factors associated with audiometric test error.
Proceedings: 1989 industrial hearing conservation conference, April 12-14, 1989. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, purchase order no. 93-6808, 1989 Apr; :17-19
An area in which errors are found in audiometric test results was examined. Specifically, the study determined to what extent test error was affected by the time interval between audiograms and the hearing threshold level on the baseline audiogram. The test subjects included 6754 male and 3101 female employees of a large manufacturing department of the Du Pont Company. The employees had been given audiometric tests from 1980 through 1986 and were not located in noisy areas. Hearing levels on the baseline audiogram were compared with those for subsequent audiograms. Frequency distributions of the difference between hearing threshold levels were analyzed, and test error was calculated for each sex, for each test frequency, by interval between audiograms and by hearing threshold level. The findings indicated that audiometric test error was related not only to the test frequency, but also to the time interval between audiograms and the hearing threshold level on the baseline audiogram. The authors conclude that, in establishing criteria for significant threshold shifts, all three of these factors should be considered.
Industrial-noise; Steady-state-noise; Impact-noise; Acoustical-measurements; Acoustic-signals; Noise-induced-hearing-loss; Sound-analyzers
Proceedings: 1989 industrial hearing conservation conference, April 12-14, 1989