[The degree of disability in cases of small noise induced hearing losses (author's transl)].
For calculation of the degree of disability in cases of small noise induced hearing losses, Lehnhardt has developed a table which divides the range of small hearing losses into two groups with 0% and 10% respectively, and makes it possible to pick up the degree of disability directly by use of the audiometrical data from tone and speech audiometry. A comparison between the degrees of disability picked up from this table and those, which are received from the table of Boenninghaus and Röser using only the results of speech audiometry, shows that the table of Lehnhardt in more cases yields a degree of 10% disability than the table of Boenninghaus and Röser. In the range of beginning to severe hearing loss both tables give results which statistically are not different. In cases of noise induced hearing loss in combination with other causes of hearing disability, where the low frequencies also have severe hearing loss, the table of Lehnhardt enables one to calculate the noise induced part of the whole hearing loss against another kind of hearing defect.
D001299:Audiometry / Q000379:methods*; D004185:Disability Evaluation; D006317:Hearing Loss, Noise-Induced / Q000175:diagnosis*; D006801:Humans
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