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National Health and Nutrition Examination Survey III : NHANES III : audiometry and tympanometry for health technicians' manual
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March 1991
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Description:Revised March 1991
The hearing component of the NHANES III was developed by NCHS with NIOSH and the National Institute of Neurological and Communicative Disorders and Stroke (NINCDS) and will involve two types of hearing tests. Tympanometry obtains information on the state of the middle ear; air- conduction audiometry measures hearing thresholds. Hearing loss due to noise exposure can be inferred from the pattern of hearing loss in the air-conduction tests.
Information on distributions of hearing levels in the representative NHANES III sample will provide a reference for many of the work environments studied by NIOSH. Data on hearing loss in adults will be used by NIOSH to provide prevalence data of noise-induced hearing loss.
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